UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): July 15, 2016

American Realty Capital Healthcare Trust III, Inc.

(Exact Name of Registrant as Specified in Charter)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 5.07. Submission of Matters to a Vote of Security Holders.

American Realty Capital Healthcare Trust III, Inc.’s (the “Company”) 2016 annual meeting of stockholders (the “Annual Meeting”) was initially called to order on June 30, 2016 and was adjourned for lack of quorum. The Annual Meeting was reconvened on July 15, 2016. At the reconvened Annual Meeting on July 15, 2016, there were present, in person or by proxy, stockholders holding an aggregate of 3,467,068 shares of the Company’s common stock, out of a total number of 6,845,893 shares of the Company’s common stock issued and outstanding and entitled to vote at the reconvened Annual Meeting.

At the reconvened Annual Meeting on July 15, 2016, stockholders voted on (i) the election of B.J. Penn, Sue P. Perrotty and Edward M. Weil, Jr. to the Company’s Board of Directors for one-year terms until the 2017 annual meeting of stockholders and until their respective successor is duly elected and qualified and (ii) the ratification of the appointment of KPMG LLP (“KPMG”) as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2016.

The stockholders elected all three nominees for director and ratified the appointment of KPMG. The full results of the matters voted on at the reconvened Annual Meeting are set forth below:

Proposal 1 – Election of Directors

Proposal 2 – Ratification of the Appointment of KPMG as the Company’s Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2016:

Other Proposals

The reconvened Annual Meeting was adjourned to July 29, 2016 at 1:00 p.m. (local time) to be held at 405 Park Avenue, New York, New York to permit stockholders of record as of April 18, 2016 additional time to consider the proposals listed below, and to enable the Company’s proxy solicitor, Broadridge Investor Communication Solutions, Inc., more time to solicit stockholder votes. Valid proxies submitted prior to the Annual Meeting on July 15, 2016 will continue to be valid for the reconvened Annual Meeting, unless properly changed or revoked prior to votes being taken at the reconvened Annual Meeting.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.