The request for dismissal of the civil case was filed Tuesday in Los Angeles County Superior Court.
The dismissal form did not include any information on the reason for dismissal.
“I can confirm we received the dismissal and it’s nice to see that it was voluntarily and permanently dismissed by the claimant,” Walton's attorney, Mark Baute, said in an email Thursday afternoon.
A message seeking comment was left with Mardirossian & Associates, the law firm representing Tennant.
Tennant sued Walton last April, shortly after he became the Kings' coach following his dismissal from the Los Angeles Lakers.
Tennant alleged that Walton attacked her when he was an assistant coach for the Golden State Warriors, which was from 2014 to 2016. She said she confided in people at the time but never filed charges because she was scared.
She said Walton continued to harass her after he became coach of the Lakers and she was working as a broadcaster in Los Angeles for Spectrum SportsNet and SportsNet LA.
Walton's attorneys had responded to the lawsuit with a filing that denied all allegations.
In August, the Kings and the NBA announced they were taking no action against Walton after not finding enough evidence during an investigation into the allegations. The Kings and NBA said the matter was considered closed barring the emergence of further evidence.