DENIS LYNCH will not compete with the Irish Olympic show jumping team.
Horse Sport Ireland have confirmed their decision not to proceed with the Tipperary man's nomination following the disqualification of Lynch's mount Lantinus during the Nations Cup event at Aachen last week.
His brother Shay said that Lynch was "devastated" by the decision and is considering an appeal.
Show jumping team manager Robert Splaine will now put forward another combination from his list of reserves, which includes Cian O'Connor, who was disqualified at the Games in Athens in 2004.
Lantinus was disqualified from the premier fixture in Aachen, Germany, when testing positive for hypersensitivity. This was the third positive test in 12 months for a horse ridden by the German-based Irishman who was last week named alongside Billy Twomey in Ireland's Olympic squad.
The international governing body, the FEI, says a horse is considered hypersensitive when "nerve sensation or sensitivity" is increased "beyond normal limits".
Lynch was disqualified on the final day of the individual show jumping competition during the Beijing Games in 2008 when Lantinus tested positive for a banned substance.