(India Today) – Amid U.S. sanctions, Iran on Monday said "small pressures" will not affect its age-old ties with India and that the current phase in the relationship will "pass". 

Iran's Ambassador to India Ali Chegeni also said the trade relationship between the two countries were on an upswing.

"Iran and India have very good relations based on centuries-old ties. These small pressures (sanctions) on the two sides (will not affect ties)...This (phase) will pass," he said at a seminar organized by the Institute of Social Sciences.

He also slammed the U.S. for unleashing "economic terrorism" on Iran.

Economic terrorism is worse than the terrorists who killed security forces personnel in Pulwama in Jammu and Kashmir or in other such attacks as an economic terrorist's act hits poor people, he said.

Chegeni said that the U.S. was spreading unrest in his region to sell its arms.

He also hit out at U.S. President Donald Trump for withdrawing from the nuclear deal in 2018.

The U.S. signed the Joint Comprehensive Plan of Action (JCPOA) and then the American president withdrew, he said.

"How can we negotiate like this," he said.

"You (U.S.) should come back, we never left the negotiating table," the Iranian envoy said, adding that the negotiation has to be based on mutual respect.

On Foreign Minister Mohammad Javad Zarif's unscheduled visit to the G-7 summit, he praised French President Emmanuel Macron for his efforts to defuse the tensions between Tehran and Washington by finding ways of resuming dialogue.

As six-month-long exemptions from U.S. sanctions to buy oil from Iran ended in May, India had said it will deal with the issue based on three factors -- the country's energy security, commercial consideration and economic interests.

In November, the U.S. had granted a six-month waiver to India, China, Greece, Italy, Taiwan, Japan, Turkey and South Korea to continue importing oil from Iran. The temporary waiver ended on May 2.

In May last year, the U.S. promised to bring back sanctions on Iran after withdrawing from the Iran nuclear deal which was struck in 2015.

The U.S. had told India and other countries to cut oil imports from the Persian Gulf nation to "zero" by November 4 or face sanctions. However, Washington had granted a six-month waiver from sanctions to eight countries, including India.