Turkey's crude oil imports from Iran fell more than 30% to 75,281 barrels per day in October from September as substitute oil from other suppliers including Iraq and Saudi Arabia rose more.
Iraq was Turkey's biggest crude supplier in October with 105,000 barrels per day while Russia came second with 103,248 barrels per day. Imports from the Islamic Republic which was once supplying more than 60% of Turkey's crude requirement came third.
Turkey was granted a waiver on Iranian oil by the United States for 180 days from June 11 after Ankara made an initial 20% import cut before sanctions came into effect.
Mr Taner Yildiz energy minister of Turkey said that Turkey expected the exemption to continue after December. Turkey's sole refiner Tupras imported a total of 417,202 barrels per day of crude oil in October.