The IAAF has scuppered Devetzi's comeback plans
Olympic triple jump medallist Hrysopiyi Devetzi of Greece has been ruled out of the 2012 London Games.
Athletics' world governing body the IAAF has activated a two-year ban for a doping control offence in May 2009.
Devetzi, 35, who won bronze at the 2008 Beijing Games and silver in Athens in 2004, had recently announced that she planned to return to elite competition.
But the IAAF said she is on its list of sanctioned athletes and not eligible to compete again until 8 December 2012.
Devetzi's suspension was initially handed down after she failed to submit a sample to anti-doping controllers.
But she rendered the ban ineffective by quitting athletics.
The president of the Greek athletics federation, Vassilis Sevastis, said: "A [federation] commission was to deal with the case, but the IAAF decided to examine it and impose a penalty."