In a post on his Twitter account on Tuesday, Zarif said Washington's sanctions have "drained the country's economic resources" and are impairing its ability to fight the outbreak of the new coronavirus (COVID-19).
"They [sanctions] literally kill innocents. It is immoral to observe them: doing so has never saved anyone from future US wrath," Zarif added.
The top Iranian diplomat called on those following the US lead to "join the growing global campaign to disregard" Washington's sanctions on the Iranian nation.
President Donald Trump reinstated US sanctions on Iran in May 2018 after he unilaterally left the 2015 nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA), signed between Iran and major world powers.
The International Court of Justice (ICJ) — known as the World Court — has ordered the US to lift the sanctions it has illegally re-imposed on humanitarian supplies to Iran.