India, China, Japan, Italy, Greece, South Korea, Taiwan and Turkey make the list of eight countries granted temporary waiver for purchase of Iranian oil.
The US sanctions have pitted Washington against several of its key allies in Europe, who remain committed to the nuclear agreement. Among those are 50 Iranian banks and subsidiaries, more than 200 people and ships, Iran's state-run airline Iran Air and more than 65 of its planes.
Sajjadpour said that a "political civil war" was under way in the United States between an internationalist school of thought and supporters of Trump asserting a new and "narrow-minded definition of American nationalism which negates the interests of the rest of the world". It had been consultation with the Trump administration since the USA pullout from the Iran nuclear deal in May.
Iran's President Hassan Rouhani earlier struck a defiant tone, saying the country will "continue selling oil".
He said that two of the eight jurisdictions will wind down Iranian oil imports to zero in "weeks" and the six others will import "at greatly reduced levels".
According to a report by the US State Department, since 2012, Iran has spent $16bn on proxy groups in the region as well as support for Syrian President Bashar al-Assad. "The maximum pressure exerted by the U.S.is only going to mount from here", he added.
"The head of Iran's central bank, Abdolnasser Hemmati, said Iranian banks should use their previous experience dealing with sanctions to support the foreign trade process and financial transfers", according to the state news agency, IRNA.
While in a dramatic escalation of rhetoric, the Iranian President said the country now faces a "war situation".
However, the Democratic Party leadership criticised Trump for giving exemptions to some of the major Iranian oil importers. The sanctions freeze any assets that those targeted have in USA jurisdictions and bar Americans from doing business with them. "This is not about hurting the people of Iran, but we will not let money be diverted to humanitarian purposes and then put for terrorist activities". "We are prepared to resist any pressure", Rouhani said.
In accordance with its agreement with the United States, the government did not reveal how frequently the waivers will need to be renewed or by how much buyers would need to cut back on oil imports from Iran to avoid penalties.
"Cutting off import of refined products would be a problem because Iraq, despite its huge resources, has a refining shortage and depends on Iran for refined products", Kirk Sowell, the head of political intelligence firm Utica Risk Services, told Al-Monitor.
These concessions, first reported last week by the Washington Free Beacon and subsequently confirmed by numerous publications, have riled Iran hawks on Capitol Hill and elsewhere who have long fought to close all existing loopholes in USA sanctions. Iran is already in the grip of an economic crisis. "The European Union does not approve of it", said European Economic Affairs Commissioner Pierre Moscovici, regarding the sanctions.
There was no immediate statement from the Ministry of External Affairs but sources in New Delhi said this was the result of hectic negotiations over the last six months with U.S. officials.
He argued European leaders had now put behind them a period of "appeasement" of Trump in order to develop the special goal legal mechanism that they hope will enable companies to get around the USA penalties.