She also repeatedly thanked those who expressed their support.
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".
The show had been renewed for an 11th season after scoring huge ratings and generally positive reviews for its season-10 opener - including from the president who appreciated the new pro-Trump perspective. I feel so empowered by @iamwandasykes, Channing Dungey and anyone at ABC standing up for morals and abuse of power. "I made a awful mistake wh (ich) cause hundreds of ppl 2 lose their jobs". "I am now leaving Twitter". She criticised Democratic financier George Soros and tweeted that Chelsea Clinton was "Chelsea Soros Clinton", implying she was married to a nephew of Mr. Soros.
In another tweet, Barr asked people to not defend her, even though it was "sweet" of them to try, and claimed she was on Ambien (sleeping medication) at the time of the incident. "I honestly thought she was Jewish and Persian-ignorant of me for sure, but.I did".
Barr also appeared to advocate for the firing of other prominent comedians who have made insensitive or offensive jokes about public officials, including Jimmy Kimmel, Joy Behar and Bill Maher, sharing with her 714,000 followers several boycott campaigns.
Barr got what she deserved, said Shonda Rhimes, creator of hit ABC shows like "Grey's Anatomy" and "Scandal". Sara Gilbert, a co-star, also tweeted that the remark was abhorrent.
Rockets’ Chris Paul out for Game 7 of Western Conference Finals
They opened with an 11-0 run to spark a dominant second half that made National Basketball Association history. It slows the Warriors' offense down while making them more predictable, and that favors the Rockets' defense.
"#Rosanne is who she tells you she is with every comment and tweet".
Earlier, speaking on MSNBC, she said: "I'm fine. She's distancing herself from me and my tweet-she has to".
The backtrack was not enough for her colleague Wanda Sykes, however. We applaud ABC for taking a stand against racism by canceling 'Roseanne.' We commend the network and ...
Having earlier apologised for her racist tweet which referred to Ms Jarrett as a product of the Muslim Brotherhood and the Planet of the Apes, Barr attempted to provide an explanation for her comments, saying she was under the influence of the sleeping drug Ambien.
In a tweet penned to Valerie, she said: "I want to apologize to you".
"Look, as you know, the president has been extremely focused, as I just walked through, on the things going on with the upcoming summit", she had responded, adding, "the president's focused on North Korea and he's focused on trade deals and he's focused on the economy".