Exhibit 99.3

NGL ENERGY PARTNERS LP AND SUBSIDIARIES

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED

FINANCIAL STATEMENTS

Introduction

The following represents the unaudited pro forma condensed consolidated balance sheet of NGL Energy Partners LP (“we”, “NGL” or “the Partnership”) as of September 30, 2012 and the unaudited pro forma condensed consolidated statements of operations for the year ended March 31, 2012 and for the six months ended September 30, 2012. The accompanying unaudited condensed consolidated financial statements give pro forma effect to a number of transactions, which are summarized below:

·                  On December 31, 2012, we entered into a Sale Agreement (the “Sale Agreement”) with Third Coast Towing, LLC (“Third Coast”) and the former owners of Third Coast (the “Selling Members”) pursuant to which we acquired all of the limited liability company membership interests of Third Coast in exchange for $43.0 million in cash. The purchase price may be subject to further adjustment under the terms of the Sale Agreement, including with respect to refinements to the estimated value of the acquired working capital.

·                  On December 31, 2012, we entered into a Call Agreement (the “Third Coast Call Agreement”) with the Selling Members pursuant to which the Selling Members agreed to purchase at least $8.0 million (or at their option, up to $10.0 million) of common units of the Partnership at an agreed value of $23.21 per unit in a private placement. On January 11, 2013, the Selling Members purchased 344,680 common units pursuant to the Third Coast Call Agreement.

·                  On November 2, 2012, we completed an acquisition of Pecos Gathering & Marketing, L.L.C. and its affiliated companies Transwest Leasing, LLC, Blackhawk Gathering, LLC, Midstream Operations, LLC, and Striker Oilfield Services, LLC (collectively, “Pecos”) pursuant to an Equity Purchase Agreement (the “Equity Purchase Agreement”) with Pecos and the owners of Pecos. We acquired all of the limited liability company membership interests of Pecos in exchange for approximately $134.6 million of cash, which included payments made to the selling owners and payments made to retire certain liabilities of Pecos. The purchase price may be subject to further adjustment under the terms of the Equity Purchase Agreement, including with respect to refinements to the estimated value of the acquired working capital.

·                  In connection with the closing of the acquisition of Pecos, we entered into a Call Agreement (the “Pecos Call Agreement”) with the former owners of Pecos (the “Call Parties”) pursuant to which the Call Parties agreed to purchase at least $45.0 million (or at their option, up to $60.0 million) of common units of the Partnership in a private placement following the consummation of the Pecos acquisition. On November 12, 2012, the Call Parties purchased 1,834,414 common units for an aggregate call price of $45.0 million pursuant to the Pecos Call Agreement.

·                  On November 1, 2012, we entered into a Facility Increase Agreement to increase the commitments under our revolving credit facility.

·                  On June 19, 2012, we completed a business combination with High Sierra Energy, LP and High Sierra Energy GP, LLC (collectively, “High Sierra”). High Sierra’s businesses include crude oil gathering, transportation and marketing; water treatment, disposal, and transportation; and natural gas liquids transportation and marketing. We paid $91.8 million of cash (net of $5.0 million of cash acquired) and issued 18,018,468 common units to acquire High Sierra Energy, LP. We also paid $97.4 million of cash to retire long-term debt of High Sierra Energy, LP and to settle certain other of High Sierra Energy, LP’s obligations. Our general partner acquired High Sierra Energy GP, LLC by paying $50.0 million of cash and issuing equity. Our general partner then contributed its ownership interests in High Sierra Energy GP, LLC to us, in return for which we paid our general partner $50.0 million of cash and issued 2,685,042 common units to our general partner.

·                  On June 19, 2012, we entered into a new revolving credit agreement (the “Credit Agreement”) with a syndicate of banks. Also on June 19, 2012, we entered into a Note Purchase Agreement whereby we issued $250 million of notes payable in a private placement (the “Senior Notes”). We used the proceeds from the issuance of the Senior Notes and borrowings under the Credit Agreement to repay existing debt and to fund the acquisition of High Sierra.

·                  On February 3, 2012, we completed a business combination transaction with North American Propane, Inc. (“North American”), whereby we acquired retail propane and distillate operations in the northeastern United States. We paid $69.8 million in exchange for the assets and operations of North American, including working capital.

·                  On January 3, 2012, we completed a business combination transaction with seven companies associated with Pacer Propane Holding, L.P. (collectively, ‘Pacer”), whereby we acquired retail propane operations, primarily in the western United States. We issued 1,500,000 common units and paid $32.2 million in exchange for the assets and operations of Pacer, including working capital. We also assumed $2.7 million of long-term debt in the form of non-compete agreements.

·                  On November 1, 2011, we completed a business combination transaction with SemStream, L.P. (“SemStream”), whereby we acquired SemStream’s wholesale natural gas liquids supply and marketing operations and its 12 natural gas liquids terminals. We issued 8,932,031 common units and paid $91 million in exchange for the assets and operations of SemStream, including working capital.

·                  On October 3, 2011, we completed a business combination transaction with E. Osterman Propane, Inc., its affiliated companies and members of the Osterman family (collectively, “Osterman”), whereby we acquired retail propane operations in the northeastern United States. We issued 4,000,000 common units and paid $94.9 million, net of cash acquired, in exchange for the assets and operations of Osterman. The agreement also contemplated a post-closing payment of $4.8 million for certain specified working capital items, which we paid in November 2012.

·                  During May 2011, we sold a total of 4,025,000 common units in our initial public offering at $21 per unit. Our proceeds from the sale of 3,850,000 common units of $72.1 million, net of estimated total offering costs of approximately $8.7 million, were used to repay advances under a credit facility and for general corporate purposes. Proceeds from the sale of 175,000 common units ($3.4 million) were used to purchase 175,000 of the common units outstanding prior to our initial public offering.

The accompanying unaudited pro forma condensed consolidated balance sheet as of September 30, 2012 gives pro forma effect to the following, as if such transactions (in each case, as described in more detail above) had occurred on September 30, 2012:

·                  Our business combination with Third Coast;

·                  The sale of common units pursuant to the Third Coast Call Agreement;

·                  Our business combination with Pecos;

·                  The sale of common units pursuant to the Pecos Call Agreement; and

·                  Our entry into the Facility Increase Agreement.

The accompanying unaudited pro forma condensed consolidated statement of operations for the six months ended September 30, 2012 gives pro forma effect to the following, as if such transactions had occurred on April 1, 2011:

·                  Our business combination with Third Coast;

·                  The sale of common units pursuant to the Third Coast Call Agreement;

·                  Our business combination with Pecos;

·                  The sale of common units pursuant to the Pecos Call Agreement;

·                  Our entry into the Facility Increase Agreement;

·                  Our business combination with High Sierra;

·                  Our entry into the Credit Agreement; and

·                  Our issuance of Senior Notes.

The accompanying unaudited pro forma condensed consolidated statement of operations for the year ended March 31, 2012 gives pro forma effect to the following, as if such transactions had occurred on April 1, 2011:

·                  Our business combination with Third Coast;

·                  The sale of common units pursuant to the Third Coast Call Agreement;

·                  Our business combination with Pecos;

·                  The sale of common units pursuant to the Pecos Call Agreement;

·                  Our entry into the Facility Increase Agreement;

·                  Our business combination with High Sierra;

·                  Our entry into the Credit Agreement;

·                  Our issuance of Senior Notes;

·                  Our business combination with North American;

·                  Our business combination with Pacer;

·                  Our business combination with SemStream;

·                  Our business combination with Osterman; and

·                  Our initial public offering.

The unaudited pro forma condensed consolidated financial statements are provided for informational purposes only and should be read in conjunction with the following:

·                  The audited historical financial statements of NGL Energy Partners LP included in our Annual Report on Form 10-K for the year ended March 31, 2012;

·                  The unaudited condensed consolidated financial statements of NGL Energy Partners LP included in our Quarterly Reports on Form 10-Q for the three months ended June 30, 2012, September 30, 2012, and December 31, 2012;

·                  The audited and unaudited historical financial statements of Third Coast Towing, L.L.C. included in this Current Report on Form 8-K/A;

·                  The audited and unaudited historical financial statements of Pecos Gathering and Marketing, LLC, Transwest Leasing, LLC, Blackhawk Gathering, LLC, Midstream Operations, LLC, Toro Operating Company, Inc., and Striker Oilfield Services, LLC included in our current report on Form 8-K/A filed on January 18, 2013;

·                  The audited and unaudited historical financial statements of High Sierra Energy GP, LLC included in our Current Report on Form 8-K/A filed on September 4, 2012;

·                  The audited historical financial statements of North American included in our Form 8-K/A filed on April 20, 2012;

·                  The audited historical financial statements of Pacer included in our Form 8-K/A filed on March 19, 2012;

·                  The audited and unaudited historical financial statements of SemStream included in our Form 8-K/A filed on December 23, 2011;

·                  The audited and unaudited historical financial statements of Osterman included in our Form 8-K/A filed on December 19, 2011; and

·                  The audited historical financial statements of Osterman, the unaudited historical financial statements of SemStream, and the unaudited historical financial statements of North American included in our Form 8-K filed on November 20, 2012.

The historical results of operations of High Sierra, Pecos, and Third Coast included in the unaudited pro forma condensed consolidated statement of operations for the year ended March 31, 2012 represent the results of their operations for the year ended December 31, 2011.

The following unaudited pro forma condensed consolidated financial statements are based on certain assumptions and do not purport to be indicative of the results that actually would have been achieved if the events described above had occurred on the dates indicated. Moreover, they do not project NGL’s results of operations for any future date or period.

The accompanying unaudited pro forma condensed consolidated statements of operations reflect depreciation and amortization estimates which are preliminary, as our identification of the assets and liabilities acquired, and the fair value determinations thereof, for the Third Coast, High Sierra, and Pecos business combinations have not been completed. The fair value estimates reflected in the accompanying unaudited pro forma condensed consolidated statements of operations are based on the best estimates available at this time. There is no guarantee that the preliminary fair value estimates, and consequently the unaudited pro forma condensed consolidated statements of operations, will not change. To the extent that the final acquisition accounting results in an increased allocation of goodwill recorded, this amount would not be subject to amortization, but would be subject to annual impairment testing. To the extent the final acquisition accounting results in a decrease to the preliminary computation of goodwill done for the purpose of preparing these unaudited pro forma statements of operations, the amount would be subject to depreciation or amortization, which would result in a decrease to the estimated pro forma income reflected in the accompanying unaudited pro forma condensed consolidated statements of operations. We expect to complete the final acquisition accounting for the High Sierra combination prior to filing our Form 10-K for the year ended March 31, 2013. We expect to complete the final acquisition accounting for the Pecos combination prior to filing our Form 10-Q for the quarter ended September 30, 2013. We expect to complete the final acquisition accounting for the Third Coast combination prior to filing our Form 10-Q for the quarter ended December 31, 2013.

NGL ENERGY PARTNERS LP

Unaudited Pro Forma Condensed Consolidated Balance Sheet

As of September 30, 2012

(U.S. Dollars in Thousands)

See accompanying notes.

NGL ENERGY PARTNERS LP

Unaudited Pro Forma Condensed Consolidated

Statement of Operations

For the Year Ended March 31, 2012

(U.S. Dollars in Thousands, Except Unit and Per Unit Amounts)

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See accompanying notes and continuation on Page 2 of 4.

NGL ENERGY PARTNERS LP

Unaudited Pro Forma Condensed Consolidated

Statement of Operations

For the Year Ended March 31, 2012

(U.S. Dollars in Thousands, Except Unit and Per Unit Amounts)

(Page 2 of 4)