"The Islamic Republic of Iran stresses clearly that it will take no measures beyond its commitments under the JCPOA and will accept no changes to this agreement now or in the future and will not allow that the JCPOA be linked to any other issue [than the nuclear issue]", the statement read.
In a background briefing, senior administration officials said this is Trump's "waiver" on Iran.
The US president on Friday reluctantly agreed to waive sanctions against Iran that were lifted as part of the landmark deal, but said it would be the last time he issued such a waiver unless conditions were met. "Russia will do everything in its power to save the agreement".
That in turn would cause crude prices to rise by $5 a barrel, CitiGroup wrote, "as customers losing oil under U.S. pressure scramble for replacements at a time when OPEC and other producers have put a lid on their output". Russia and China are adamantly opposed to renegotiating the deal, as is Iran. "The protesters in Iran are expressing legitimate grievances, including demanding an end to their government's oppression, corruption and waste of national resources on military adventurism".
The Germany foreign office tweeted that it, too, is taking time to coordinate with its European partners on how to respond, but remains committed to the Iran nuclear deal. The president also said a new deal must have no expiration date, and that it must impose sanctions if Iran develops or tests long-range missiles.
"If they (the US officials) are entertaining such thoughts, they won't need to wait for a few more months to know (that Iran's position is not going to change)", he said, adding that they will regret it sooner or later.
Although Trump approved the waiver on U.S. sanctions as spelled out in the deal, Washington announced other sanctions against 14 Iranian entities and individuals, including judiciary head Ayatollah Sadeq Larijani, a close ally of Iran's Supreme Leader Ayatollah Ali Khamenei.
In October, Trump accused Iran of "not living up to the spirit" of the agreement even though the International Atomic Energy Agency says Tehran is complying.
China will continue playing a constructive role in maintaining and implementing the Iran nuclear deal, Chinese Foreign Minister Wang Yi said on Saturday.
The issue was also discussed by French president Emmanuel Macron and Mr Trump in a phone call on Thursday.
Iran's Foreign Minister Mohammad Javad Zarif said earlier on Twitter that the deal was "not renegotiable" and that Trump's move "amounts to desperate attempts to undermine a solid multilateral agreement".
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