An elite private school affiliated with the United Nations confiscated dozens of middle-school yearbooks filled with swastikas and other hate imagery — the latest antisemitism scandal to rock the $50,000-a-year Manhattan institution, The Post has learned

The United Nations International School in Turtle Bay sent a letter to parents Wednesday announcing it confiscated the yearbooks that also contained racist language and launched an investigation to determine “consequences” for those involved.

The school said it discovered “hate speech, including swastikas and antisemitic, xenophobic, racist, and homophobic remarks” in the “autograph” section of multiple yearbooks.

In the letter, the school — which counts actress Pauline Chalamet, former Knicks player Joakim Noah and former President George H.W. Bush’s daughter Dorothy Bush as grads — encouraged students to come forward and identify those responsible, calling on “upstanders” to report their classmates.

Overall, 15 students have been identified as potentially involved in the incident involving more than 30 yearbooks. School officials said all confiscated yearbooks will be “destroyed” once the investigation is completed.

UNIS spokesperson Lupe Todd-Medina told The Post that the school canceled Wednesday’s 8th grade school dance for 130 students, but it wasn’t a “punishment.”

“The school has made it very clear that the cancellation of the ‘social’ is not intended to be a punishment for everybody, but reflects their profound sadness and disappointment,” she said.

“The middle school gathered for a session led by their diversity and inclusion director to discuss hate speech and its impact on the community.”

Students found to have written in the yearbooks were banned from Thursday’s graduation, the spokesperson confirmed.

The pre-K to 12 school, which caters to diplomats’ kids, has been under fire for a series of antisemitic incidents, including a longtime Jewish teacher who filed a discrimination suit in February alleging administrators ignored her complaints of Jew hatred and retaliated against her for speaking out.

The lawsuit stated that UNIS accepted more than $110 million in pledged funding from Oman and Qatar, and that the permanent representatives of both nations sit on the school’s board of trustees.

A UNIS rep dismissed the lawsuit.

 “The United Nations International School stands firm against these baseless allegations. We are confident that this matter will be addressed through the proper legal process and that our institution’s integrity and reputation will be upheld,” said UNIS spokesperson Lupe Todd-Medina.

An Israeli parent told The Post that a past yearbook contained keffiyeh imagery, along with “Free Gaza” stickers on campus that were “upsetting” to Jewish students.

“I don’t think the school is doing enough to deal with antisemitism and Israeli boycotts,” the parent said.

A private school advisor told The Post the school is seeing an exodus of outraged families.

“All of our clients are leaving the UN School in disgust. It went from a top tier private school to a school no one wants to apply to in less than five years,” added the expert, who blamed Executive Director Dan Brenner for “running the school into the ground.”

Guided “by the ideals” of the UN, the school was founded in 1947 by a group of UN parents “to provide an international education for their children, while preserving their diverse cultural heritages.”