Exhibit 23.3

CONSENT OF REX BRYAN

The undersigned, Rex Bryan, hereby states as follows:

I, Rex Bryan, assisted with the preparation of the “NI 43-101 Technical Report, Mt. Todd Gold Project 50,000 tpd Preliminary Feasibility Study, Northern Territory, Australia” effective date May 29, 2013, issue date June 28, 2013 for Vista Gold Corp. (the Company”), the “NI 43-101Technical Report Preliminary Economic Assessment of Guadalupe de los Reyes Gold/Silver Project, Sinaloa, Mexico” effective date February 8, 2013, issue date March 4, 2013 (together all such reports, the “Technical Reports”) portions of each of which are summarized (the “Summary Material”) in this Annual Report on Form 10-K for the year ended December 31, 2014 (the “Form 10-K”).

I hereby consent to the incorporation by reference in the Company’s Registration Statements on Form S-3 (Nos. 333-196527, 333-172826, and 333-184191) and any amendments thereto, and in the related Prospectuses, and in the Company’s Registration Statements on Form S-8 (Nos. 333-134767, 333-153019, 333-176792, 333-191505, 333-191507) of the Summary Material concerning the Technical Reports and the reference to my name as set forth above in the Form 10-K.