In a tweet that has since been deleted by the comedian, she likened Valerie Jarrett, a former adviser to Barack Obama, to an ape.
Ms Barr later apologized for her offensive tweet. But ABC decided to cancel the reboot of her hit 90’s sitcom. The show made a comeback in March this year after a 21-year hiatus.
Within 24 hours of Ms Barr’s deleted tweet, there have been over two million tweets mentioning her first name.
The controversy has led to some people backing ABC’s decision while others have been claiming the TV network showed double standards over free speech.
After a brief self-imposed Twitter exile, Ms Barr came back to post a number of tweets including one where she said she was, “tired of being attacked and belittled”. She also retweeted messages of support.