The statement by Manouchehr Mottaki was distributed in a letter to his counterparts throughout the world.
"Iran is still consistent with and will abide by its commitments under agreements on comprehensive guarantees to the IAEA. In line with these [commitments] inspections by the agency of Iranian nuclear facilities continue unhampered," Iranian television quoted him as saying.
Mottaki stressed that Iran's nuclear activity, including uranium enrichment, was in line with the IAEA statues, the Nuclear Non-Proliferation Treaty and the Safeguards Agreement.
Iranian and EU negotiators will meet in Vienna on November 21 to continue preparations for the next round of talks on Tehran's controversial nuclear program, which some Western countries suspect is geared towards the development of weapons.
A report delivered on Thursday by IAEA Director General Mohamed ElBaradei said Iran had been truthful, in general, about key aspects of its "nuclear dossier," but warned that Tehran continues to work on uranium enrichment, despite persistent demands that the country fold the program.
The Islamic Republic is currently subject to two sets of UN Security Council sanctions over its defiance to halt uranium enrichment. A further round of tougher sanctions has been blocked by Russia and China.
Iran insists that it needs nuclear energy for electricity generation and not weapons production.