King Mohammed VI of Morocco was seen with his eyes closed as the French leader addressed crowds and honoured soldiers who died during WWI.
The US President, who was seated two spaces from the royal, looked unimpressed as he looked past his wife Melania to notice the king with his eyes shut.
The ceremony marked 100 years since the Armistice happened at the Tomb of the Unknown Soldier in front of the Arc de Triomphe in Paris.
King of Morocco falls asleep during ceremony, President Trump seems not to like it: pic.twitter.com/WvucURVkL8— BNL NEWS (@BreakingNLive) November 12, 2018
Mr Trump was seated between Melania and Germany’s chancellor Angela Merkel as Mr Macron also spoke about the dangers of nationalism at the ceremony earlier this week.
The French president said: "Patriotism is the opposite of nationalism. Nationalism is treason, if we think our interest may only come first and we don't care for others, it is treason of our values… a betrayal of all moral values, we must remember this.
"It is those values and virtues that motivated those who sacrificed all to defend democracy... It is those values and those virtues that gave them strength because it guided their heart.
"The lessons of the Great War cannot be of vengeance nor forgetting the past. We must think of the future and preserve that which is essential."
The comments appeared to be directly targeting the US leader as he recently declared himself a nationalist.
Mr Trump later responded by taunting Mr Macron with a tweet which claimed the French “were starting to learn German in Paris before the US came along”.