U.S. Secretary of State John Kerry will meet with Iranian Foreign Minister Mohammad Javad Zarif in New York on April 19.
U.S. officials told the Reuters and AP news agencies that the two will meet before Kerry flies to Saudi Arabia to join President Barack Obama at a summit with Gulf Arab leaders.
The officials were not authorized to discuss Kerry's plans publicly and spoke on condition of anonymity.
The meeting follows complaints from top Iranian leaders that Washington is not fulfilling its part of the nuclear deal, in which Iran curbed its nuclear activities in exchange for sanctions relief.
Washington insists it has met its obligations but is considering easing or clarifying financial regulations about legal trade with Iran.
Zarif, speaking in Tehran on April 16, said Iran would pressure the United States to ease restrictions on non-American banks doing business with the Islamic republic, saying it would help reassure Iranians over the nuclear deal.