This decision was taken following a fitness test in Johannesburg last week to evaluate speed and endurance.
While the overall results were impressive, two of the 10 participating referees - all of whom feature in the list of candidates for the 2010 FIFA World Cup - suffered injuries which prevented them from completing the tests.
The two referees who were unable to complete the tests due to injury were Carlos Batres (Guatemala), who suffered a strain of the calf muscle in his right leg, and Carlos Amarilla (Paraguay), who suffered a tear of the hamstring muscle in his right leg.
The following trios will therefore not officiate at the Confederations Cup:
Referee: Carlos Batres (Guatemala) and assistant referees, Leonel Leal (Costa Rica)/Carlos Pastrana (Honduras)
Referee: Carlos Amarilla (Paraguay) and assistant referees, Emigdio Ruiz (Paraguay)/Nicolás Yegros (Paraguay)