Sprinter Dwain Chambers will not make his return to the track at the Norwich Union Grand Prix on Saturday.
Chambers will wait to clear up outstanding matters with the IAAF
Former 100m European champion Chambers, 27, was banned for two years for taking the designer steroid THG in 2003.
It had been hoped he would compete in the 60m but he has still to be fully reinstated by the International Association of Athletics Federation.
Chambers' agent Richard Robson said: "He won't run until the procedures have been completed."
It would have been extremely unlikely he would have figured anyway as all lanes for the event at the National Indoor Arena in Birmingham have been filled.
Chambers' suspension ended in November and he has completed the four mandatory drug tests required by the IAAF to race.
However, the IAAF wish to speak to Chambers about an interview he gave to the BBC, in which he said he was using THG at the beginning of 2002, rather than in August the following year.
He has until 21 February to contact the IAAF about the situation and Chambers has elected not to compete until the matter has been cleared up.
IAAF spokesman Nick Davies said: "Dwain has complied with his re-alignment requirements for the 2003 offence under IAAF rules.
"But there is a new situation of potential violation of the rules based on a interview with the BBC in December 2005.
"This continues to be investigated and we understand Dwain will not be competing until this situation has been resolved."
The revelations will not count as a second offence, which would have seen Chambers banned for life.
But it is possible he could be asked to pay back prize money he earned between the date he admits to taking the steroid and when he was caught.