Mohammad Javad Zarif also referred to elections in Iran in June. If a hardline president is elected, this could further jeopardize the deal, Reuters reports.
"Time is running out for the Americans, both because of the parliament bill and the election atmosphere that will follow the Iranian New Year," Zarif said in an interview with Hamshahri newspaper published on Saturday.
Iran’s new year begins on March 21.
The parliament, dominated by hardliners, passed the legislation in December that set a two-month deadline for an easing of sanctions.