Iran has been at the center of international concerns over its nuclear program, which some countries, particularly the United States, suspect is geared toward nuclear weapons development. Tehran has consistently denied the claims, saying it needs nuclear power for civilian purposes.
"Our cooperation with the agency will continue, and if a new resolution is adopted by the UN Security Council, we will reconsider our cooperation with the agency and will think of other options," Hosseini said.
The Iranian diplomat earlier said his country had agreed as planned with the UN nuclear watchdog on a timetable to clear up remaining questions over the Islamic Republic's controversial nuclear program.
The UN Security Council has passed two sanctions resolutions against Iran since December over the Islamic Republic's failure to meet a UN demand to halt uranium enrichment. The six countries negotiating the dispute - the UN Security Council permanent members plus Germany - have demanded that Tehran suspend all uranium enrichment before negotiating a solution to the nuclear program.
Iran insists that it needs nuclear power purely to generate electricity. President Mahmoud Ahmadinejad announced early April the start of uranium enrichment on an industrial level.