HAMILTON, Canada

Iran's mission to the UN warned the UN Security Council on Thursday that its members face a "decisive moment" on the ongoing nuclear file.

"The UNSC members stand at a decisive moment: either back the Russia-China draft resolution for technical extension and diplomacy, or trigger snapback with grave consequences," it said on US social media company X.

The statement stressed that the reaction of the E3 -- Britain, France and Germany -- will be crucial in determining the path forward.

"The E3's reaction to the draft will ultimately show whether they are truly committed to diplomacy or pushing the crisis forward," it added.

The development comes after the E3 announced Thursday that they notified the Security Council about Iran's "significant non-performance" under the 2015 nuclear deal, triggering a 30-day period before the possible reestablishment of previously terminated Security Council resolutions.

The European countries have urged Iran to resume negotiations with the US on its nuclear program and allow international inspectors to monitor sites and stockpiles of highly enriched uranium.

The US left the 2015 nuclear deal in 2018 and re-imposed its own sanctions on Iran.

Earlier this year, it entered indirect nuclear talks with Iran, but Israel attacked Iran in June, and a sixth round of discussion in Oman was canceled.

The 12-day war saw the US bombing three Iranian nuclear sites.

The US has maintained that Iran must give up its nuclear program, but Tehran argues its program is only for civilian purposes.