The Turkish lira weakened as far as 6.4 to the dollar in early trade on Wednesday, its weakest since Aug. 15. By 0728 GMT, it was at 6.3700.
The lira dipped 1.1 percent to 6.1000 against the dollar from a close of 6.0330.
The euro fell 0.2 percent to $1.1421 EUR= but was still above 2018 lows of $1.3010 hit last week.
The currency gained some support from the announcement late on Wednesday of a Qatari pledge to invest $15 billion (11.8 billion pounds) in Turkey.
Signs the U.S. economy remains robust ahead of an expected interest rate hike by the Federal Reserve next month have helped the dollar outperform other currencies recently.
Finance Minister Albayrak said in an interview published late on Sunday that Turkey has drafted a economic action plan and will start implementing it to ease investor concerns.
A plunge in the Turkish lira rocked global equities and emerging markets on Friday and fear of more turmoil sent investors scurrying for safety in assets like the yen and U.S. government bonds.
Turkey's lira plunged as much as 14 percent on Friday as worries about President Tayyip Erdogan's influence over monetary policy and worsening U.S. relations
Turkey's lira weakened more than 2 percent on Thursday, giving up some of the hefty gains it made after the central bank raised interest rates
The lira also fell sharply against the Japanese yen, amid talk of Japanese retail investors selling the lira as stop-loss levels were hit.