U.S. President Donald Trump said on Wednesday in a presidential memorandum that he had determined there was sufficient supply of petroleum and petroleum products from nations other than Iran to permit a reduction in purchases from that country.

The memorandum, addressing the secretaries of State, Treasury and Energy, comes days ahead of the administration's renewed sanctions on Iranian oil exports, planned to come into effect on Nov. 5.

(Reporting by Humeyra Pamuk, Lesley Wroughton, Arshad Mohammed, Editing by Rosalba O'Brien) ((humeyra.pamuk@thomsonreuters.com; +90 212 3507062; Reuters Messaging: humeyra.pamuk.reuters.com@reuters.net))