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Goop director of brand partnerships and Instagram influencer Marissa Fuchs, whose “surprise” engagement — complete with a pitch deck sent to brands — went viral, has “been exiled” following the arguably tacky stunt, according to a source.

Page Six heard fashionistas tittering in the Hamptons this weekend that Fuchs — who goes by the handle @fashionambitionist on the social platform, where she has 184,000 followers — had tried to attend a party hosted by H&M at Crow’s Nest on Thursday in Montauk, LI.

“She wasn’t invited and was turned away,” says a source. “She’s been exiled.”

But a source close to Fuchs insists she was at the spot with pals for dinner, and spontaneously decided to go down to the lake — where the bash was held — to have a drink with a view.

“It was a private event, and she asked to go in for one drink and the guard told her, ‘If I let in one person, [I] have to let in 20.’”

A rep for H&M told us “This was a very intimate private dinner with a set capacity. We always welcome new friends to the brand and would love to include her in future events.”

Fuchs gained international attention back in June when she was sent on a multi-day scavenger hunt to find the spot where her then-boyfriend, Gabriel Grossman, planned to propose to her.

It was later revealed that the proposal had been pitched to brands to have their products involved months before Grossman surprised Fuchs by popping the question.