The July 14 deal foresees increased overview of Iran's nuclear activities by the UN's International Atomic Energy Agency.
Reza Najafi, the IAEA's chief Iranian delegate, quoted White House spokesman Josh Earnest as saying that would result in enhanced U.S. or Israeli military action against Iran — if needed — "because we'd been spending the intervening number of years gathering significantly more detail about Iran's nuclear program".
As part of White House pushback against congressional and other critics of the deal, Earnest, in his comments to reporters July 17 said that the U.S. "military option would remain on the table".
Najafi, in a July 24 letter posted to the IAEA website, called Earnest's statement "outrageous". He said it "seriously undermines the very basic principles" needed to implement the deal, adding that the comments amount to "a material breach of the commitments" agreed to by the United States and the five other world powers at the negotiating table with Iran.
Citing Earnest, Najafi also suggested that Washington could try to violate provisions of the nuclear deal committing the agency during its Iran monitoring to "protect commercial, technological and industrial secrets as well as other confidential information coming to its knowledge".
In Tehran, an official said Iran will not allow American or Canadian inspectors working for the UN nuclear watchdog to visit its nuclear facilities.
Deputy Foreign Minister Abbas Araqchi 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 Araqchi. "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".
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.