France's Christelle Daunay withdrew from the London Olympics on Thursday because of a toe injury suffered during training.
Daunay, who holds the French record in the women's marathon, was advised to pull out of the games after x-rays showed she sustained a fracture in the second toe of her left foot.
She had finished 20th in the women's marathon four years ago in Beijing.
"This is hard for me, but I have to say thank you to the medical team, my husband, my coach Cedric Thomas and my supporters for their encouragement," Daunay said.
The women's marathon will take place August 5.