Nabil Kaouk was killed on Saturday, a day after the death of the militant group’s leader for more than three decades, Hassan Nasrallah.
Samoa’s PM Fiame Naomi Mata’afa has called for those attending the meeting to dress comfortably, according to The Sunday Telegraph.
The Homeland and Band of Brothers actor joined more than 1,000 people driving sheep along a historic trading route on Sunday.
The incident on Saturday came after the group’s overall leader, Hassan Nasrallah, was killed in Beirut on Friday.