In November of 2016, the U.S. government added another country to the list of those whose nationals qualify for H-2A visas (for temporary agricultural workers invited by a U.S. employer) and H-2B visas (for temporary nonagricultural workers invited by a U.S. employer).
The newly added country is St. Vincent and the Grenadines. That brings the total number of countries on the list to 85 countries whose nationals may receive H-2As and 84 countries whose nationals may receive H-2Bs. Although it is not absolutely required that a country be on this list in order for its nationals to receive these visas, it is the norm.
Countries are chosen for this list on the basis of whether admission of their nationals is important for the operation of the H-2A or H-2B programs and the countries are cooperative in repatriating their citizens, subjects, nationals, or residents who have been ordered removed (deported) from the United States.
For more information, see the October 26, 2016 Federal Register notice.