Former United States President Donald Trump has announced a new trade measure that places a 25 percent tariff on any country that continues to do business with Iran. The decision, which he said takes effect immediately, was made public through a post on his social media platform, Truth Social.

According to Trump, any nation that maintains commercial ties with Iran will now face a penalty on all business conducted with the United States. He described the order as final and non-negotiable, stressing that it is part of a broader effort to pressure the Iranian government.

The move could significantly affect global trade, especially for countries such as China, India, the United Arab Emirates and members of the European Union, many of which have economic links with Iran while also trading heavily with the US. Analysts believe the tariff could force some governments to reconsider their trade relationships.

The announcement follows reports from human rights organisations that a violent crackdown on protesters in Iran has led to many deaths in recent days. Trump has previously warned that the US could respond if the Iranian authorities continue to use force against civilians, making this tariff part of a wider political and diplomatic pressure strategy.