He made the remarks while talking to Japan's Kyodo News in New York on Sunday.
According to the Kyodo News website, he said Iran and six world powers will resume their nuclear talks in a European city in less than two weeks, with "differences on major issues" still remaining.
Araqchi said the nuclear talks in New York were "constructive”, although differences on major issues still remain to reach a deal before the deadline.
"We have been able to have a much better understanding in a constructive atmosphere but there are differences on major issues," Deputy Iranian Foreign Minister Abbas Araqchi told the news agency.
Iran and the six powers -- Russia, France, China, Britain, the United States and Germany -- had 11 days of nuclear talks on the sidelines of the UN General Assembly meeting in New York.