The official Kuwait News Agency reported today that Ambassador Abdulaal al-Qenai said Lebanese authorities informed him of the murder in the town of Burj Hammoud, northeast of the capital, Beirut.
Two other Kuwaitis were found killed Thursday inside a room of a restaurant they owned near Beirut.
The killings come two weeks after Kuwait and other Gulf Arab states urged their citizens to avoid traveling to Lebanon and said those already there should leave.
Kuwait is also part of a Saudi-led bloc of six Gulf Arab nations that recently branded Lebanon's Hezbollah a terrorist organisation, heightening tensions between the group and the Gulf states.