Conspicuously absent from the event in Potocari Monday were representatives from Serbia, b92 reported.
Serbian President Boris Tadic visited the site of the massacre on the 10th and 15th anniversaries, where he apologized for the crimes committed in Serbia's name.
Serbian units under the control of Gen. Ratko Mladic, now on trial for war crimes, allegedly killed more than 8,000 men and boys, some as young as 11, in July 1995. It is the largest mass murder committed in Europe since World War II.
"Representatives of our government go there each year. However, we do not think we should apologize every time we go there, because we have still not heard an apology from the other side," Milorad Dodik, president of Republika Srpska, said in a Tanjug report,
The remains of 613 victims identified as Bosnians were to be buried at the memorial site Monday.
In a Beta report Monday, Social-Democratic Union leader Zarko Korac said Serbian officials should have attended the ceremony.