The Girls Trip star's trial had been due to start on Tuesday in Fayette County, Georgia - more than four years after she was initially arrested for falling asleep at the wheel.
While she had been facing time behind bars, Haddish's guilty plea for the DUI charge resulted in her receiving 12 months' probation instead, as well as her driver's licence in the state of Georgia being suspended.
The comedian and actor, 46, will also be subjected to random drug and alcohol testing, after being ordered to stay away from the substances for the next year, while all other misdemeanour charges were dismissed.
Haddish spent less than four hours in jail after being arrested in January 2022, but later insisted she had just been "taking a nap" behind the wheel, and was not out of control in any other way.
Speaking on the Making Space with Hoda Kotb podcast, she said: "Every time, I try to have fun, no matter what. You should have seen when I got arrested. I wish they could have filmed that whole thing. They probably did.
"But them police had a good time. I felt like, I took a nap. I blew and it was a .03, and I went home, and then I found out how famous I really am.
"I don't know what people think. I don't know what they thought. I'm not in their brains. From what I saw on the internet, people were saying, 'Ah, she's spiralling out. This is it. Her career is over. She's done.'
"And then my friends were just like, 'Girl, your ass was asleep, wasn't you."
Following her arrest, Haddish decided to give up drinking alcohol, but said that her decision to go sober had already been made by the time the incident occurred.
"I was barely drinking as it was before then because every day I would wake up, my body would hurt after I drink. Even after one drink, my body would hurt!"
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