Iran's top diplomat is pressing other countries to stand up to President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's "bullying" and save the nuclear deal signed under former President Obama.

Reuters reports that Foreign Minister Mohammad Javad Zarif was quoted in a letter to his counterparts as saying the international community should stand up to Trump following his decision to pull the U.S. from the multination accord.

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Zarif reportedly said Washington's "illegal withdraw" from the accords and “bullying methods to bring other governments in line” have delegitimized the international rule of law.

“The JCPOA (nuclear deal) does not belong to its signatories, so one party can reject it based on domestic policies or political differences with a former ruling administration,” Zarif said in the letter, parts of which were shared by Iran's state news media.

Trump announced last month that he would pull the U.S. from the deal, breaking with much of the international community, including key U.S. allies.

Trump also said former sanctions will be reimplemented and that the U.S. “will be instituting the highest level of economic sanction.”

The European Union (EU) told Iran last month that it would remain committed to the agreement, despite Trump's move.

EU nations moved quickly last month to save the nuclear accord after the U.S. withdrawal, but the bloc has said it will have difficulty ensuring all the guarantees Iran wants.