''Malaysia does not support the reimposition of the unilateral sanctions by the US against Iran,'' he told the Doha Forum, also attended by Qatar Emir Tamim bin Hamad Al-Thani.
Malaysia and other countries have lost a ''a big market'' because of the sanctions on Iran, he said.
''Such sanctions clearly violate the United Nations charter and international law; sanctions can only be applied by the United Nations in accordance with the charter,'' he added.