Nicolas Chartier has been barred from the event after sending an e-mail to voters urging them to name his movie as best film over rival Avatar.
Academy rules prohibit the mailing of members to promote or disparage a film.
But should The Hurt Locker win best picture, Chartier will still receive his Oscar statuette at a later date.
In his email, which was sent to members of the Academy of Motion Picture Arts and Sciences in late February, Chartier asked members to choose The Hurt Locker over what he described as "a $500 million
cheap sto power leveling film" - a clear reference to fellow best picture contender Avatar.
Subsequent emails, posted by the Los Angeles Times, showed Chartier asking Oscar voters to rank his film at number one and Avatar at number 10 among the list of nominated films.
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