Grossi's statements came after extended meetings with key officials in Iran over the weekend.
Diplomatic Affairs: Europeans are furious with Tehran at a level not seen since long before the 2015 JCPOA deal.
The Iranians are leveraging every opportunity to acquire strategic military capabilities and hardware that were previously out of their reach.
Biden said the deal is dead, while the US State Department said that the US would return to it if the Iranians would - worrying Netanyahu.
“The Iranians reneged on commitments they had made,” said State Department Spokesperson Ned Price.
The statement comes after PM Netanyahu claimed efforts to revive the JCPOA were still underway.