The actress - who played man-eater Edie Britt in the first five seasons ABC series - has agreed to remove her claims of discrimination and harassment based on sex, age and sexual orientation.
However, she is still continuing with her allegations of assault and battery and wrongful termination.
Last month, the 47-year-old star decided to leave the claim of intentional infliction of emotional distress out of her case against Cherry, ABC and Touchstone TV so she could avoid undergoing a psychiatric or physical examination.
Nicollette filed a lawsuit against the parties in Los Angeles Superior Court last April, claiming wrongful termination, retaliatory termination, assault and battery, discrimination based on sex and age, gender violence, breach of good faith and intentional infliction of emotional distress - the charge which she has subsequently dropped.
In her original suit, the actress - who is suing for $20 million damages - claimed Marc hit her across the face and sacked her when she complained to network ABC.
However, the broadcasters have claimed the director gave her a "light tap" while they were rehearsing a scene.
Howard Davine, Executive Vice President of Abc Studios, previously stated: "Marc Cherry simply gave her a light tap on the side of her head for the sole purpose of providing direction for a scene they were rehearsing."
Nicollette was informed in February 2009 that her employment on the show was going to be terminated and that her character was being killed off.