Iranian Foreign Minister Mohammad Javad Zarif says President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE has failed to live up to the nuclear deal with Tehran.

"Since President Trump has been in office, he has not actually lived up to the deal," Zarif told CBS's Margaret Brennan in an interview airing Sunday on "Face the Nation." "He has taken and his administration have taken every measure in order to make sure that Iran does not benefit economically from the deal."

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Zarif also warned that Iran is ready to ramp up its nuclear work if Trump pulled the U.S. out of the deal and resumed sanctions.

"We have put a number of options for ourselves and those options are ready, including options that would involve resuming at a much greater speed our nuclear activities," he said.

Trump has set a May 12 deadline to negotiate changes to the deal with European allies. And he's threatening to pull out if the U.S. and its allies cannot agree on "significant changes."

Asked if Iran could trust Trump, Zarif cited the administration's record.

"Well, I think the international community has seen that the United States and I do not want to personalize this that ... the United States under this administration has not been in a mood to fulfill its obligations," he said.

"So that makes the United States not very trustworthy."