LOS ANGELES - The motion picture academy has banned Will Smith from attending the Oscars or any other academy event for 10 years following his slap of Chris Rock at the Academy Awards.

The move on April 8 comes after a meeting of the academy’s Board of Governors to discuss a response to Mr. Smith’s actions.

“The 94th Oscars were meant to be a celebration of the many individuals in our community who did incredible work this past year; however, those moments were overshadowed by the unacceptable and harmful behavior we saw Mr. Smith exhibit on stage,” the academy said in a statement.

“I accept and respect the Academy’s decision,” Mr. Smith said in response. He pre-emptively resigned from the academy on April 1 during the run-up to the meeting, calling his actions “shocking, painful, and inexcusable.”

Mr. Smith will keep the Oscar he won after the slap, and he will remain eligible to be nominated for and to win more of them in the 10-year period, though he can’t show up to accept them.

The academy also apologized for its handling of the situation and allowing Mr. Smith to stay and accept his best actor award for “King Richard.”

“During our telecast, we did not adequately address the situation in the room. For this, we are sorry,” the academy said. “This was an opportunity for us to set an example for our guests, viewers and our Academy family around the world, and we fell short — unprepared for the unprecedented.”

In a statement in the days following the Oscars, the academy said Mr. Smith was asked to leave the ceremony but refused. But it’s not clear how the message was delivered to Mr. Smith or what form it took, and several media outlets reported that he was never formally told to leave the Dolby Theatre. The Los Angeles Times reported April 7 that Oscars producer Will Packer told Mr. Smith: “Officially, we don’t want you to leave. We want you to stay.”

The ban also means Mr. Smith will not be presenting one of the major awards at next year’s Oscars, as is tradition for the best actor winner.

The academy in its statement also expressed “deep gratitude to Mr. Rock for maintaining his composure under extraordinary circumstances.”

The academy has not revoked Oscars from expelled members Harvey Weinstein or Roman Polanski.

With his resignation from the academy, Mr. Smith lost the ability to vote for nominees and winners. Mr. Smith has been nominated for four Oscars, winning once.

At the March 27 Academy Awards, Mr. Rock came out to present the best documentary award and made jokes about several attendees, including Mr. Smith’s wife, Jada Pinkett Smith.

“Jada, I love you. ‘G.I. Jane 2,’ can’t wait to see it,” Mr. Rock said.

Ms. Pinkett Smith, who has spoken publicly about her hair loss condition, alopecia, had a closely shaved head similar to that of Demi Moore in the 1997 movie.

Mr. Smith strode from his front-row seat on to the stage and smacked Mr. Rock, stunning the comedian, the theater crowd and viewers at home. Many thought it was a planned gag set up by the show or the men themselves, but the seriousness of the situation set in after Mr. Smith returned to his seat and angrily twice shouted at Mr. Rock to “keep my wife’s name out your (expletive) mouth.”

Mr. Rock said he had no interest in pursuing charges when asked by police backstage.

Mr. Smith took the stage again less than hour later to accept his Oscar, tearfully apologizing to the academy but notably omitting any mention of Mr. Rock.