Lamine Diack has resigned from his post as president of the International Athletics Foundation (IAF) amid corruption allegations.
The former IAAF head is under investigation by the French authorities for allegedly accepting money to cover up failed doping tests from Russian athletes.
The 82-year-old was suspended from his role as an honorary member of the International Olympic Committee (IOC) on Tuesday, and has now severed ties with the IAAF's charitable arm.
"The IAAF confirms it has tonight received a letter from Lamine Diack resigning his position as President of the International Athletics Foundation," the body said in a statement.
"This information has been passed to IAF Honorary President HSH Prince Albert II of Monaco. Discussions will be held in due course regarding the IAF and the appointment of a new IAF President."
A World Anti-Doping Agency independent commission has called for Russia to be suspended from competitive athletics due to allegations of doping, cover-ups and extortion.
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