According to a spokesman for Iran's nuclear agency, Tehran will inform the United Nations nuclear watchdog in Vienna on Tuesday that it had started the process to increase uranium enrichment capacity.
The head of Iran's nuclear agency, Ali Akbar Salehi, said Iran is prepared to resume work on advanced centrifuges that would dramatically increase its capacity for enrichment.
Under the 2015 nuclear agreement that Iran signed with world powers, it has the right to build and test certain centrifuges, although detailed restrictions exist for the first 10 years on the types and quantities of the machines.
Europe's attempts to limit Iran's ballistic missile program will never become reality, Iran's Supreme Leader, Ayatollah Ali Khamenei, said, adding that Tehran has no plans to limit is influence across the Middle East, either.
The country's Atomic Energy Organisation spokesman Behrouz Kamalvandi told ISNA news agency a letter would be handed over to the International Atomic Energy Agency.
Since then, Khamenei and other Iranian officials have been on the attack, threatening to increase uranium enrichment.
At the briefing, Macron warned of the risk of an "escalation" in the Iranian nuclear standoff after Tehran announced plans to boost uranium enrichment capacity to pressure Europeans scrambling to save the landmark deal.
Iran, which won sanctions relief in exchange for limiting its nuclear program, has said repeatedly its nuclear activity was exclusively peaceful in nature.
The 2015 deal limited Iran to enriching uranium only to 3.67%, far below the roughly 90% threshold of weapons-grade material.
Katz believes that the current situation leaves Tehran with two options: Either to accept the 12 conditions outlined by US Secretary of State Mike Pompeo for the resumption of talks regarding the nuclear deal or "start a process of an economic collapse, and maybe even a regime, collapse".
European leaders have moved to salvage the deal after US President Donald Trump's announcement of Washington's exit on May 8.
For all of Iran's fierce public riposte to USA threats of tougher sanctions, some senior Iranian officials see the US position as a "bargaining strategy" and believe the door to a diplomatic compromise should stay open.
Netanyahu will meet French President Emmanuel Macron on Tuesday and British Prime Minister Theresa May on Wednesday.
"I will discuss with them ways to block Iran's nuclear aspirations and Iran's expansion in the Middle East", Netanyahu said last week of his European meetings, noting the issues were "crucial to Israel's security".
The vote brought an end to a 12-year investigation into the "past and present issues" regarding Iran's nuclear activities, which the United Nations nuclear watchdog had been probing under pressure from the Israeli regime, the USA and their allies.
He will be hosted by President Emmuanuel Macron at the Elysee Palace on Tuesday, after traveling from Berlin.
A senior diplomat in Vienna, where the IAEA is based, said the call for timely cooperation did not mean that Iran had breached any of the rules of the accord but that the agency was "encouraging (Iran) to go above and beyond the requirements" of the deal.