She also said she was leaving Twitter.
In the post-firing tweet, Barr apologized to "all the wonderful writers (all liberal) and talented actors who lost jobs on my show due to my stupid tweet".
Barr also revealed she would appear on Joe Rogan's podcast on Friday.
As well as two further apologies to Jarrett, Barr released a statement on Twitter, which read: "I deeply regret my comments from late last night on Twitter". She's been dropped as a client by her agency ICM Partners and reruns of the show's original episodes have been pulled from Viacom networks (including TV Land, Paramount Network, and CMT), the Laff broadcast network, as well as removed from streaming service Hulu.
After the announcement, co-star Sara Gilbert wrote, "Roseanne's recent comments about Valerie Jarrett, and so much more, are abhorrent and do not reflect the beliefs of our cast and crew or anyone associated with our show. Forgive me-my joke was in bad taste", she said.
Her appearance was confirmed by a tweet from the official Twitter account for The 11th Hour With Brian Williams, which was accompanied with a video of Jarrett responding to Barr's since-deleted post.
Alberto could drench the Tennessee Valley, cause wind damage
Subtropical Storm Alberto was holding on to its 65 miles per hour winds as it neared landfall in the Florida Panhandle on Monday. However, the moisture associated with it will create widespread showers and storms through the middle of next week.
Ireland votes to legalise abortion in landslide ‘Yes’ victory: exit polls
Exit polls also indicated that women voted for the repeal of the 8th of Amendment by 72% where as men supported the repeal at 65%. Currently, the 8th amendment, a clause in the Irish constitution, gives equal right to life of the mother and the unborn.
Trump's blocking of critics on Twitter violates Constitution - U.S. judge
Users can still reply to tweets after they've been muted, even if those replies are never seen, the ruling pointed out. Noah Feldman, a Harvard law professor, said he thinks the case was wrongly decided and expects it to be reversed.
Barr's tweet on Tuesday may have been the straw that broke the camel's back, but there's a lot to understand about how exactly "Roseanne" came to an end.
The host then showed off a series of clips from Roseanne without the titular lead, instead focusing on her husband, John Goodman's Dan.
What did her bosses and colleagues say?
The announcement sent ripples through the entire industry, with Robert Iger, chairman and CEO of the Walt Disney Company, which owns ABC, quoting the official statement that called Barr's tweet "abhorrent, repugnant and inconsistent with our values". "I'm anxious about the people out there who don't have a circle of friends and followers who come right to their defence". "I am disappointed in her actions to say the least".
She also tweeted that she was quitting the social media platform, writing: "I apologize [sic]".
"#Rosanne?is who she tells you she is with every comment and tweet". "Don't feel sorry for me, guys!"