Newsweek has reached out to the U.S. State Department for comment. If talks fail to get back on track, there is a higher risk of further military action against Iran's nuclear program from the United States as well as Israel.

Iran says it is ready to engage in talks with the United States, but only if Washington takes meaningful steps to rebuild trust.

Iran is ready to resume nuclear talks with the United States as long as some principles are respected, deputy Foreign Minister Kazem Gharibabadi said on Thursday, a day before a meeting with European powers in Istanbul.