Europe's package of economic measures to offset the USA pullout from the nuclear deal does not go far enough, President Hassan Rouhani told French President Emmanuel Macron by telephone on Thursday, Iranian state news agency IRNA reported.
The meeting between Iran, Germany, Britain, France, Russia and China will consider proposals for salvaging the 2015 deal, known as the Joint Comprehensive Plan of Action, which is meant to prevent Tehran from developing nuclear weapons.
The top diplomats of Iran and five world powers meet Friday as Tehran seeks assurances it will benefit economically from the nuclear deal despite the U.S. withdrawal from the pact.
Since Trump's shock move in May, Washington has warned other countries to end business in Iran and stop buying its oil from early November or face punitive measures.
The other partners so far appear powerless to stop their countries' companies pulling out of Iran for fear of USA penalties.
They said they remained committed to the accord and to building up trade and investment links with Iran, including "the continuation of Iran's export of oil and gas" and other energy products.
"The Iranians expect the others to say what we are going to do to keep the deal alive".
The Iranian president highlighted the problems that Washington's unilateral withdrawal from the JCPOA has created for the European companies involved in Iranian projects.
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Rouhani started on Monday his visits to Switzerland and Austria as Iran and the European Union are holding talks on how to save the nuclear deal despite the USA pullout.
"If the process of the European foreign ministers' meeting in Vienna, which is aimed at encouraging Iran to cooperate, is promising, we will continue our cooperation", he said.
During a visit to Europe this week President Hassan Rouhani warned that Iran could reduce its co-operation with the United Nations nuclear watchdog having already threatened Trump of the "consequences" of fresh sanctions against Iranian oil sales.
Since Trump s announcement, Iran s rial currency has fallen, prices have risen and the country has been hit by street protests and strikes.
While talks are expected to focus purely on the nuclear deal, they come amid increasing rhetoric from the Trump administration, which argues that Iran poses a serious security threat.
Six people were arrested - a diplomat attached to the Iranian embassy in Austria - in Belgium, France and Germany, while the opposition group blamed the Iranian regime for the alleged plot.
Iran, which strongly denies ever seeking to build a nuclear bomb, has warned it could resume uranium enrichment for civilian purposes if the deal collapses.