A judge tossed the $100 million lawsuit against real estate scion Robert Durst for allegedly killing and hiding his wife Kathie Durst’s body — and thus depriving her family of the right to bury her.

The three sisters and mother of Kathie — who disappeared in 1982 — brought the unusual “right to sepulcher” suit against the oddball heir of The Durst Organization and others in 2015.

Nassau County Supreme Court Justice Roy Mahon dismissed the case on Wednesday because he said it’s time-barred as it’s decades outside of the three-year statute of limitations.

The decision comes the same day trial began in the California criminal case against Durst for the alleged murder of his longtime friend Susan Berman in 2000. Prosecutors allege that Durst murdered her because she had knowledge about Kathie’s disappearance.

Durst, 76, was acquitted of the 2001 murder of Morris Black in Galveston, Texas, after claiming self-defense in that case.

Kathie’s family’s lawyer Robert Abrams declined to comment.

Durst’s lawyer did not immediately return a request for comment.