Iran's economy, already strained by high inflation, years of Western sanctions and a war that has sharply reduced oil revenue, is poised for more instability as the Trump administration tries to coerce other countries into ending all financial dealings with the Islamic Republic.

A decision by the United Arab Emirates to suspend trade relations with Iran last week kick-started the White House's latest attempt to isolate Tehran into submission. Iran entered the war with its foreign commerce concentrated among a relatively small group of countries, leaving it with fewer places to turn now.