United States Foreign Service Commemorative Coin Act This bill directs the Department of the Treasury to mint and issue not more than 50,000 $5 gold coins, 400,000 $1 silver coins, and 750,000 half-dollar clad coins in recognition of the 100th anniversary of the United States Foreign Service. All surcharges received by Treasury from the sale of such coins must be paid to the Association for Diplomatic Studies and Training to support the collection, curation, and sharing of diplomatic history in the United States via oral history, books, social media, and other means.