American sprinter Jon Drummond has pulled out of the World Championships.
The 34-year-old caused controversy by refusing to leave the track after being disqualified from the 100m quarter-final on Saturday for a false start.
His withdrawal came hours before the International Association of Athletics Federations (IAAF) threw him out "for behaviour bringing the sport into disrepute".
Drummond will miss the 4x100m relay for the US, who were also hit by the exit of 100m world record holder Tim Montgomery and three-time world 100m champion Maurice Greene.
Montgomery has left Paris for undisclosed reasons while Greene was injured in the 100m semi-finals.
"During Sunday's 100 metres quarter-finals I felt very strongly that I was disqualified from the race unfairly and I
protested my disqualification," Drummond said in a statement.
"I honestly believe I did not false start. It was never my intention to harm the sport in any way or to inconvenience my fellow competitors or the fans.
"Today I announce that I am withdrawing from the world championships and the remainder of the 2003 track season.
"My spirit is broken because it has always been my desire to provide entertainment for the fans."
The IAAF had demanded the USA Track & Field take disciplinary action against Drummond.
But after the Tuesday evening deadline expired, the USATF said there were no procedures under its bye-laws to carry out an investigation in such a short period.
IAAF president Lamine Diack said the issue will be examined at an IAAF Council meeting on Thursday when Drummond could face further suspension.
"I think it's a serious case," IAAF vice president Arne Ljungqvist said.
"Athletes at the top level know they should respect the judges and the rules. Disqualification from these championships should be a minimum punishment."
Under the new false start rules introduced this year, once any athlete has committed one false start the next person who jumps the gun is thrown out of the race regardless of who was penalised first.
"It is unfortunate that what transpired on Sunday has resulted in negative perception for the sport or its athletes," said Drummond, who apologised personally to Diack on Tuesday.
"I have devoted 15 years of my life to the sport that I love and I have always tried to be a goodwill ambassador.
"It is my hope that positive results will come from what was an unprecedented situation for everyone involved on Sunday night."