FNA- Iranian Foreign Ministry Spokesman Bahram Qassemi reiterated his country's opposition to any changes to the internationally-endorsed 2015 nuclear deal between Tehran and the world powers.

"Nothing more will be added or reduced from the nuclear deal," Qassemi stressed on Sunday.

He lauded Europe for its firm position on the nuclear deal, and said, "The Europeans also think that the nuclear deal is not negotiable and changeable and all sides should remain committed to their undertakings based on the nuclear deal."

In relevant remarks last Monday, Russian Foreign Minister Sergei Lavrov stressed that Moscow will not back the US attempts to change the 2015 nuclear deal struck between Iran and the Group 5+1 (the US, Russia, China, France and Britain plus Germany).

"We will not support what the US is trying to do, changing the wording of the agreement, incorporating things that will be absolutely unacceptable for Iran," Lavrov said at a news conference in Moscow.

Lavrov's remarks came a few days after US President Donald Trump extended sanctions waivers on Iran to give Washington and its European allies a chance to �fix the terrible flaws� of the nuclear agreement.

"I have outlined two possible paths forward: either fix the deal�s disastrous flaws, or the United States will withdraw," Trump said last week.

In his remarks, Lavrov emphasized his country�s determination to work to preserve the existing nuclear agreement with Iran.

Russia's top diplomat also warned that the breakdown of the deal could be detrimental to dialogue with North Korea.

"If the deal is put aside and Iran is told, 'you keep up with your obligations or we will impose sanctions again', then you have to put North Korea in its place," Lavrov said.

"They are being promised that sanctions will be lifted if they give up their nuclear program. They will give it up, but no one will lift the sanctions against Pyongyang," he added.

The agreement, known as the Joint Comprehensive Plan of Action (JCPOA), was reached between Iran and six world powers in July, 2015. The deal puts limitations on parts of Iran�s peaceful nuclear program in exchange for removing all nuclear-related sanctions.