Díaz-Balart has strongly supported the right of self-determination on the Falkland Islands, over which there is a sovereignty dispute between Argentina and the United Kingdom. On April 18, 2013, Díaz-Balart introduced a resolution to the United States House of Representatives calling on the United States Government to officially recognize the result of the 2013 Falkland Islands sovereignty referendum in which the Falkland Islanders overwhelmingly voted to remain a British Overseas Territory. Díaz-Balart introduced a similar resolution in 2017, recognizing the result of that year's general election in the Falklands.