A nuclear deal between Iran and world powers is possible if the other side refrains from "excessive demands," Iranian Foreign Minister Mohammad Javad Zarif said Tuesday as he arrived for a final round of talks.

"A deal is still possible," Zarif was quoted by Iranian media as saying. "If, because of excessive demands by the other side, we don't get a result then the world will understand that the Islamic Republic sought a solution, a compromise and a constructive agreement and that it will not renounce its rights and the greatness of the nation."