His jokes attracted vitriol from some disappointed England fans, who accused the Jojo Rabbit director of not being compassionate enough.
One person shared: "Are you kidding me? You're from New Zealand and you're trying to lose a load of English fans?"
"I'm unfollowing. I'm sorry but their [sic] essentially teenagers' hearts breaking and you're just being awful," another chortled.
Others reminded fans not to take the jokes so personally:
"It's a football game. He's not laughing at some tragedy," a Twitter user wrote.
"Why are people so mad at a 3 letter tweet," another said.
"Guys it's just a bunch of grown men kicking a ball," another posted.
Waititi responded to horrifying footage showing football fans involved in a brawl: "Yeah cool country, mate."
Actor Josh Gad, who voices Olaf in Disney's Frozen franchise, responded to Waititi's tweet and called the footage "unbelievably messed up."
"It's really sad," Waititi replied.
Waititi is known for his great sense of humour, and his jokes about the outcome of the Euro 2020 competition are even funnier considering the director's next major movie.
His upcoming movie is Next Goal Wins, which is based on the adaptation of a 2014 British documentary about the American Samoa football team that suffered the worst loss in World Cup history. The team lost 31-0 to Australia in 2001.
Next Goal Wins stars several big names, including Elisabeth Moss, Michael Fassbender, Rhys Darby, Frankie Adams, Rachel House, and Oscar Knightley.
There is no release date yet, and it is unclear if embattled actor Armie Hammer will still appear in the movie after facing allegations of sexual assault and misconduct.