PARIS — A visit that would have been the first by an Albanian prime minister to Belgrade, the Serbian capital, in nearly 70 years has been postponed after a provocative stunt at a soccer match in Belgrade that fanned ethnic tensions, spurred violence and provoked apparent cyberattacks.

Prime Minister Edi Rama was scheduled to visit Belgrade on Wednesday, the first trip there by an Albanian leader since 1946. The meeting, heralded by Albania and Serbia as a seminal moment for regional reconciliation after a bloody ethnic war in Kosovo in the 1990s, has now been set for Nov. 10.

Both sides said over the weekend that Mr. Rama’s trip to Belgrade would be delayed to allow tensions to subside.

Serbian officials have accused Mr. Rama’s brother, Olsi Rama, of releasing a small drone carrying a nationalist Albanian flag during a qualifying match last week between the two countries for the 2016 European Championship.