Monday's remarks by Foreign Ministry spokesman Bahram Ghasemi came after Trump last week said that with the USA increasing sanctions on Iran, "at a certain point they're going to call me and say 'let's make a deal, ' and we'll make a deal".
The US is also pushing its allies to cut Iran oil purchase to zero by November. However, the Ayatollah regime said the US must stop what it calls "hostile" policies toward Iran.
Mnuchin spoke to reporters while en route from Mexico, where he was part of a high-level USA delegation led by Secretary of State Mike Pompeo to meet Mexico's next president, Andres Manuel Lopez Obrador.
Since the USA president pulled Washington out of the nuclear deal, European countries have been scrambling to ensure that Iran gets enough economic benefits to persuade it to stay in the deal.
India is faced with a "challenging situation" after the USA in May this year withdrew from the Iran nuclear deal to create pressure against Tehran's atomic program. Iran reasserted its rights to respond to United States violations if remedial measures prove insufficient.
Uncertainly surrounding the re-imposition of USA sanctions has already rocked Iran, contributing to the Iranian rial falling sharply against the US dollar and sparking waves of protests across the country.
The Associated Press was not provided access to the new details of the Mossad operation.
"That might include pressure to release oil from the Strategic Petroleum Reserve, which the administration indicated they were considering on Friday", said Lipow.
Iran and the U.S. have not had diplomatic relations since 1980, when American embassy officials were held hostage in Tehran.
Mnuchin said he would meet with counterparts from developed and developing countries on the sidelines of a G20 finance ministers' meeting in Buenos Aires on July 19-22.
Experts who specialize in sanctions-related laws said the merits of the Iranian lawsuit might be weak, partly because of what they called Iran's own transgressions of the 1955 treaty. "We're already working very closely with our counterparts", Mnuchin said. "We want to be very careful in the wind down around the energy markets to make sure that people have the time".
"We are not looking to grant licenses or waivers.But we are prepared to work with countries that are reducing their imports on a case-by-case basis", Brian Hook, Director of Policy Planning at the State Department has been quoted as saying.
French Economy Minister Bruno Le Maire told Le Figaro on Friday that after the USA dismissed the European request, he had asked for at least more time before the sanctions kicked in, but that too was rejected.More news: Donald Trump says Barack Obama did nothing about Russian election meddling
More news: What Dori would have said Tuesday if he were President Trump
More news: Air strikes kill seven civilians in southern Syria
Paris had singled out key areas where it expected either exemptions or extended wind-down periods for French companies, including energy, banking, pharmaceuticals and automotive.
The documents have heightened Israel's distrust of Iran's intentions and the Joint Comprehensive Plan of Action, which Iran, the U.S., China, France, Russia, the United Kingdom, Germany, and the European Union agreed to in 2015.
Austrian ambassador Stefan Scholz, whose country now holds the presidency of the European Union, said "unorthodox and innovative measures" were being considered to allow banking transactions to continue after United States sanctions return. He did not name the country he had not yet consulted.
An absolute majority of world countries consider the U.S. move to be illegal and in violation of the Security Council resolution and global regulations.
The top Iranian diplomat wrote on his Twitter account on July 16 that the Islamic Republic has filed complaint at the court to "hold USA accountable for its unlawful re-imposition of unilateral sanctions".
"Iran is committed to the rule of law in the face of U.S. contempt for diplomacy and legal obligations. It's imperative to counter its habit of violating int'l law", he posted.
The court could not be reached for comment.
Thus, States will enact more sanctions against Iran in early August, and European companies will also be affected by these sanctions.
In dramatic turn of events the Trump administration has recently abandoned the nuke deal.
Trump also said he would reinstate USA nuclear sanctions on Iran and impose "the highest level" of economic bans on the Islamic Republic.
Ghasemi says, however, "maybe someday he will call Tehran and ask for negotiations - this is more likely".
The Organization of the Petroleum Exporting Countries agreed with Russian Federation and other oil-producing allies on June 23 to raise output from July, with Saudi Arabia pledging a "measurable" supply boost, but giving no specific numbers.