Ayatollah Ali Khamenei, Iran's Supreme Leader, also said on Saturday that Tehran will not be coerced into discussions, a day after Trump said he had sent him a letter seeking a new nuclear deal with Iran.
Iran claims it has not received any letter, but issued a flurry of statements about it.
Trump has reinstated the "maximum pressure" campaign he used in his first term to cut Iran off from the world economy and make its oil exports almost zero.