The wrongful-death lawsuit against Robert Durst accusing him of murdering his wife Kathie in the 1980s has been dismissed.

Carol Bamonte waited too long to file the suit against her sister’s alleged killer, Manhattan Supreme Court Justice Paul Goetz ruled Tuesday.

Kathie mysteriously disappeared in 1982. Her body has never been found — but an appeals court previously ruled that her date of death is Jan. 31, 1982.

Under the statute of limitations, Bamonte had two years to sue the kooky real estate scion, whom she accused in her March complaint of killing Kathie because she planned to expose the wealthy family’s illegal business dealings.

Bamonte and her lawyer argued for an exception to the statute of limitations, noting that Durst was charged in the 2000 murder of his longtime confidant Susan Berman in California — and that her death was the direct result of Kathie’s.

Prosecutors in the Golden State believe Durst killed Berman to prevent her from going to authorities with information on Kathie’s death.

But Goetz decided that the two cases have nothing to do with one another.

“The California criminal action and this action for wrongful death clearly arise from different events,” Goetz wrote.

He said an exception to the statute of limitations could apply — but only if Durst is criminally charged with Kathie’s murder.

“We are disappointed but remain encouraged that Robert Durst will eventually be charged and convicted for Kathie’s murder in New York state,” said Bamonte’s lawyer Robert Abrams. “Sometimes it takes four decades to secure justice for a murder victim and her family.”

The 76-year-old oddball heir to the Durst Organization is currently behind bars, awaiting trial in California.

He was arrested in 2015 shortly after the HBO documentary “The Jinx” aired in which he was caught on a hot mic muttering to himself, “What the hell did I do? Killed them all, of course.”

In 2003, Durst was acquitted in the murder of his neighbor Morris Black in Galveston, Texas — despite admitting to chopping up Black’s body and tossing the parts into a nearby bay. His lawyers said he acted in self-defense.

Durst’s lawyer didn’t immediately return a message.

Additional reporting by Elizabeth Rosner