In May, US President Donald Trump withdrew from a 2015 nuclear accord with Iran and ordered the renewal of US sanctions. Some sanctions took effect on Aug. 6, while those affecting the oil and banking sectors will start from Nov. 4.
India is closely monitoring the development and assessing the implication of the U.S. sanctions, Raveesh Kumar said.
India, Iran's leading oil client after China, is also developing the Chabahar Port in the Middle Eastern nation.
"Chabahar is a very important project for us, not only for access to Afghanistan and Central Asia, but also for Afghanistan itself," he said, adding that the development of the port figured in the high-level talks between India and the United States in New Delhi earlier this month.
"I can say this discussion has led to a better understanding by the United States of our objectives, concerns, sensitivities and expectations," he added.