"We obviously welcome this as a positive step and that's precisely because we have been clear for weeks now that we are ready to pursue a return to compliance with our (nuclear deal) commitments consistent with Iran also doing the same", spokesman Ned Price said.
On Friday, the Joint Commission of the Joint Comprehensive Plan of Action, the formal name for the nuclear deal, met virtually without the United States and confirmed another meeting will take place next week in Vienna.
The United States said Wednesday that it has a shared interest with Beijing in curbing Iran's nuclear program, declining to fan the flames over a 25-year cooperation pact signed by the frequent U.S. nemeses.
The online meeting will be chaired by the deputy secretary general and political director of the European External Action Service (EEAS) Enrique Mora on behalf of EU High Representative Josep Borrell.
Former US president Donald Trump unilaterally withdrew the US from the deal in 2018 and reimposed sanctions. USA and Iraqi officials are resuming a strategic dialogue soon that places energy near the top of priorities and Washington hopes "will ultimately allow Iraq to develop its energy self-sufficiency, and we hope to end its reliance on Iran", Price said. President Joe Biden has said the United States will rejoin the nuclear deal once Tehran returns to full compliance with its agreements under the deal.
Iranian Foreign Minister Javad Zarif said there would be no direct meeting between Iran and the United States as signatories gather Tuesday.
Meanwhile, the State Department said it had extended a waiver that allows Iraq to continue to buy power from Iran without being subject to US sanctions. penalties.
The 120-day extension comes ahead of the start of a "strategic dialogue" between Washington and Baghdad, slated to open via videoconference on 7 April.
He stated that the agreements "will ultimately allow Iraq to develop its energy self-sufficiency and, we hope, to end its reliance on Iran".
Earlier this month, Iranian Supreme Leader Ali Khamenei said Iran would return to the terms of the 2015 accord if sanctions are lifted.
It was created to prevent the Islamic republic from acquiring a nuclear arsenal by imposing strict limits on its nuclear programme and force it to remain exclusively civilian and peaceful.