The fund's board met in the wake of the court decision finding her guilty in a 2008 case dating back to her tenure as French finance minister. It took into account all factors including her "outstanding leadership of the Fund and the wide respect and trust for her leadership globally."
"In this context, the Executive Board reaffirms its full confidence in the managing director's ability to continue to effectively carry out her duties," the board said in a statement yesterday.
Lagarde told reporters shortly after the IMF statement that while she was not satisfied with the court decision, she would not appeal.
"There comes a point in time when one just has to stop, turn the page, and move on and continue to work with those who have put their trust in me," Lagarde said. "I will put all my energies and enthusiasm into this role."
More From This Section
She also thanked the board and IMF staff for their support during a "painful" process.
"The United States joins the IMF Executive Board in reaffirming our full support of Managing Director Lagarde," Lew said. "She is a strong leader of the IMF, and we have every confidence in her ability to guide the Fund at a critical time for the global economy."
The French court found Lagarde guilty of negligence over a massive payout to the tycoon Bernard Tapie in 2008, but she will not be fined or face prison, nor will the decision create a criminal record.
The court cleared her of negligence over her decision to refer the matter to arbitration but upheld the charge over her failure to contest the award.
She noted that the public prosecutor had sought to have the charges dismissed.
The case was another instance of controversy surrounding an IMF managing director. Lagarde was named to lead the organisation in July 2011 after her predecessor Dominique Strauss-Kahn, also a former French finance minister, was forced to resign amid a sex scandal.