Iran: by US and its allies, notably bar nuclear, missile and many military exports to Iran and target investments in: oil, gas and petrochemicals, exports of refined petroleum products, banks, insurance, financial institutions, and shipping. Enacted 1979, increased through the following years and reached its tightest point in 2010.

In April 2019 the U.S. threatened to sanction countries continuing to buy oil from Iran after an initial six-month waiver announced in November 2018 expired. According to the BBC, U.S. sanctions against Iran “have led to a sharp downturn in Iran’s economy, pushing the value of its currency to record lows, quadrupling its annual inflation rate, driving away foreign investors, and triggering protests.”

Source: Wikipedia