The world’s top antiterrorism monitoring group voted on Friday to keep Iran on its blacklist for failing to tackle terrorism financing at home, extending international sanctions at a time when the country had hoped to offset its struggling economy by doing business with Europe.

The Financial Action Task Force, a Paris-based monitoring group, had given Iran a February deadline to approve antiterrorism legislation or remain on the blacklist. Although Iran’s parliament passed the legislation, a top clerical body voted it down.

The blacklisting will complicate Iranian plans to sidestep American sanctions by instead doing business with European countries. France, Britain and Germany had said they would continue to do business with Iran as long as the country got itself off the F.A.T.F.’s blacklist.

As a way to skirt, but not violate, American sanctions, the European countries had tied a new channel for nondollar trade with Iran to its compliance with F.A.T.F. rules. The United States scrapped its nuclear deal with Iran in 2018 and reimposed crippling sanctions that have cratered oil exports and caused inflation to rocket.