A nonprofit run by a city school teacher failed to immediately tell a Bronx family their teen had drowned on an “academic enrichment” trip to Africa, according to a lawsuit.

Laniece Moore, 15, was spending two weeks in Tanzania building schools with Kids N Culture when she died in February 2016 while swimming in a hotel pool.

But administrators with the program — the brainchild of Harlem English teacher James Walter Doyle — told her family the girl was simply “delayed” in coming home, Moore’s mom, Felita Lee, claims in court papers.

“The family became frantic,” said Lee’s attorney, Tracey Brown.

It took a day or so before the family learned the truth, according to Brown — and only after Laniece’s scheduled return.

The family is suing Doyle, Kids N Culture and another company that arranged the trip, Explorica Inc., in Bronx Supreme Court for negligence.