Deputy Foreign Minister Abbas Araghchi said Iran will only allow inspectors from countries that have diplomatic relations with it. The previously undisclosed remarks were made during a Sunday meeting with parliamentarians.
"American and Canadian inspectors cannot be sent to Iran," said Araghchi. "It is mentioned in the deal that inspectors should be from countries that have diplomatic relations with Islamic republic of Iran."
He also said inspectors from the International Atomic Energy Agency will not have access to "sensitive and military documents."
Western nations have long suspected Iran is pursuing nuclear weapons alongside its civilian atomic program, allegations denied by Tehran, which insists its nuclear activities are entirely peaceful.
The U.S. And Iran severed diplomatic relations after the 1979 Islamic revolution and the hostage crisis at the U.S. Embassy in Tehran. Canada closed its embassy in Tehran and suspended diplomatic relations in 2012.