The rally in Glogjane, the place of Haradinaj's birth, lasted an hour. No incidents were reported.
Participants in the rally carried Albanian and US flags and banners which read "We are with Ramush" and "Free Ramush".
Haradinaj, a former Kosovo Liberation Army commander in the Decani area, and his two subordinates Idriz Balaj and Lahi Brahimaj, are accused of crimes against humanity and breaches of the laws and customs of war.
The three defendants are accused of murder, persecution, deportation, detention, inhumane acts, torture, kidnapping, mistreatment and rape of civilians between April and September 1998.