Mugabe triggered his own downfall by firing Emmerson Mnangagwa as his vice president last week, a move that prompted the military to intervene and place him under house arrest.
Over 190 participants attended this year's Amcham Thanksgiving celebrations, including Deputy Prime Minister Etienne Schneider and foreign diplomats.
Hailed as one of the biggest cultural events in Luxembourg, the fair attracts visitors from all four corners of the Grand-Duchy and surrounding areas.
The investigative media site 'The Intercept' on November 9 published leaked plans allegedly drawn up by the Luxembourgish private bank to destabilise the economy of the small emirate on the Persian Gulf.
"I made clear to Theresa May that this progress needs to happen at the beginning of December at the latest," European Union president Donald Tusk said after a meeting of EU leaders in Gothenburg, Sweden.
Hariri hasn't returned to Lebanon since his shock resignation announcement from Saudi Arabia on November 4, which sparked fears of an escalating regional conflict between the kingdom and Iran.