A trilateral meeting between China, Russia and Iran is scheduled to take place in Tehran at the general manager level on July 22, about the Iranian nuclear issue, said foreign ministry spokesman Esmaiel Baghaei, according to ISNA.

This new engagement precedes a separate meeting set for July 25 between representatives of Iran and three European countries, France, Germany and the UK, known as the E3.

These diplomatic efforts involving participants of the 2015 nuclear deal come after Iran's previous negotiations with the United States were halted after Israeli and American bombings in June. 

The recent 12-day war with Israel, which also saw US strikes on three Iranian nuclear sites, concluded with a US-brokered ceasefire on June 24, but talks between Tehran and Washington have yet to resume. Baghaei said there are no current plans for talks with the US.

Meanwhile, the E3 and the US have issued a threat to trigger the "snapback mechanism" if Iran fails to reach a deal on its nuclear programme by the end of August. This mechanism would reinstate all UN sanctions that were previously lifted under the 2015 nuclear deal (JCPOA).

Baghaei stated that Iran maintains strong relations with both Russia and China and has engaged in productive discussions with them regarding the snapback mechanism over the past year. Speaking at a regular press conference, he emphasised that both Russia and China, as members of the JCPOA and the UN Security Council, can play a significant role in any process that develops in this regard.

"We're engaged in ongoing discussions aimed at preventing this mechanism from being triggered or minimising its consequences," Baghaei said, asserting that from a legal, logical, moral and political perspective, there is no basis or reason for the return of the lifted sanctions against Iran.

Previously, Iranian Foreign Minister Abbas Araghchi told reporters in Tehran after a cabinet meeting on July 20 that that Iran's approach in the upcoming negotiations with the Europeans would be "stronger and more solid than in the past”. 

The Iranian delegation will include Deputy Foreign Minister for Political Affairs Majid Takht Ravanchi and Deputy Foreign Minister for International Affairs Kazem Gharibabadi.

"Iran is definitely stronger than before in pursuing its rights after the war," he said.

In a teleconference with the E3 and the EU high representative on July 18, Araghchi urged the EU and E3 to “put aside the worn-out policies of threat and pressure”, explicitly naming the snapback. He stressed that these measures "lack absolutely any moral and legal ground".

Araghchi further articulated Iran's position in a letter to the UN secretary-general and the president of the Security Council.

He accused the E3 of having "relinquished their role as 'participants' in the JCPOA through their actions and statements", rendering any attempt to reinstate terminated UNSC resolutions "null and void".

Araghchi stressed that the E3 cannot and should not be allowed to undermine the credibility of the UN Security Council by abusing a resolution to which they themselves have not been committed.

“Iran has shown that it is capable of defeating any delusional 'dirty work' but has always been prepared to reciprocate meaningful diplomacy in good faith,” he concluded.