The novel, which was made into a movie that opened last week, follows the relationships between white families in Mississippi and the black women who worked for them in the 60s.
Ablene Cooper, who works for Stockett's brother, claims a character in the book, Aibileen, was based on her without permission.
A Hinds County judge ruled Tuesday that a one-year statute of limitations elapsed between the time Stockett gave Cooper a copy of the book and the lawsuit's filing in February.
The motion for reconsideration argues Cooper didn't read the book and file the lawsuit sooner because Stockett told Cooper the character was not based on her.
The Associated Press contributed to this report.