Israeli Prime Minister Naftali Bennett warned the United States to "wake up" and not to embrace Ebrahim Raisi, Iran's new ultraconservative president-elect.
"The time has come for the other sides to make decisions," said Abbas Araqchi on Sunday.
The head of the judiciary is considered to be most likely to become Iran's next president in elections next month.
The official said success or failure of negotiations depends on whether Iran will make the decision to accept the proposed concessions and return to compliance with the JCPOA's terms.
Biden's National Security Adviser Jake Sullivan says, "There is no deal now" when it comes to an agreement that would reinstate the 2015 nuclear pact.
Officials said a suspicious Sunday blackout at a major uranium enrichment facility was likely orchestrated by foreign actors seeking to disrupt Iran's controversial nuclear program.
"I called on France to ... cease abiding by illegal sanctions imposed by the US," tweeted Iran Foreign Minister Javad Zarif, in follow-up remarks Saturday afternoon.
Iran's conservative-dominated parliament has made a legal complaint against Rouhani's government for agreeing a last-minute deal to secure international nuclear inspections.
Burns and Jake Sullivan led a secret diplomatic channel to Tehran which eventually facilitated the Iran nuclear deal.
"Terrorists murdered an eminent Iranian scientist today," Iran's Foreign Minister Javad Zarif said.
"The new U.S. administration should reconsider its inhumane behaviors toward other countries," Iranian President Hassan Rouhani said.
Secretary of State Mike Pompeo said Saturday the U.S. had reimposed international sanctions on Iran, but American allies disputed the announcement.
Trump withdrew from the Joint Comprehensive Plan of Action in 2018, claiming the deal was too lenient and vowing a re-negotiated agreement.
European diplomat Helga Maria Schmid said signatories aim to "ensure full implementation of the agreement despite current challenges."
"We have made great progress in the field of strategic and deterrent weaponry," Iranian President Hassan Rouhani said.
Days after the United States lost a bid to extend a United Nations arms embargo on Iran, China and Russia agreed to a summit aimed at avoiding potential conflict between the U.S. and Tehran.
Iranian President Hassan Rouhani specifically urged China and Russia to resist the American demand to extend restrictions.
U.N. sanctions may ultimately be reimposed on the nation.
"Instead of caving, Iran is moving step by step out of the nuclear deal and in recent months it hit six ships, attacked Saudi oil facilities and set fire to the U.S. embassy in Baghdad," Chris Wallace pointed out.
"This moment right now is on Barack Obama, not Donald Trump," Fox News contributor Pete Hegseth said.
The Obama administration sanctioned Soleimani in 2011 over his involvement in a plan to assassinate a Saudi diplomat in Washington, D.C.
Reza Pahlavi, the exiled heir to the now-defunct Iranian throne, tells Newsweek that the bloody unrest in his home country can only be solved by removing the regime in Tehran.
Trump may see a deal with Kim as his best chance for a major victory. But fallout from our domestic politics is so toxic it might scuttle the agreement—no matter its terms. This would be a massive mistake.
"These contradictory remarks are either a sign of their confused policies or is a trick to confuse the other side," Ali Khamenei said Tuesday.
Hamad bin Jassim bin Jabor al-Thani said Iranians won't crack under American economic pressure, and will look to play the long game instead.
Russian foreign minister Sergey Lavrov said American pressure on the Iran nuclear deal is designed to create a pretense for conflict.
"It's not news that the U.S. and UK differ in how to ensure Iran is never able to acquire a nuclear weapon," a spokesman for the UK Foreign Office said.
"Iranian people have proved over the past 40 years that they are ready to pay for safeguarding national identity, territorial integrity, freedom, independence and Islamic establishment," Masoumeh Ebtekar said.
"The U.S. has destabilized security of the international system through unilateralism and extra-terrestrial sanctions," Ali Shamkhani said.