“A blatant cynicism and a political tragedy,” TASS quoted him as saying.
Milanovic named Croatian Prime Minister Andrei Plenkovic as the main culprit for this decision, accusing him of betraying the interests of a minority in BiH.
Plenkovich retorted with similar accusations against the head of state.
At the moment, Albania, North Macedonia, Montenegro, Ukraine, Moldova, Serbia and Turkey have the status of official candidates for EU membership.
Among the potential ones are Bosnia and Herzegovina, as well as Kosovo.
The head of the European Commission, Ursula von der Leyen, said earlier that the authorities of Ukraine, Moldova and Georgia will have to do "homework" before moving on to a new stage of accession to the European Union.