The American husband of a Thai shipping heiress has filed for divorce in Manhattan — after her failed attempt to file an international child abduction case against him, according to court records.

Maxwell Federbush, who works for a Vietnamese investment company, filed for a contested divorce in Manhattan Supreme Court Friday from wife Nishita Shah, who was 32nd in Forbes 50 Top Richest in Thailand with her family’s worth reaching $1 billion in 2018.

The 45-year-old real estate investor is also seeking sole custody of their child.

Shah — who is managing director of her family’s 140-year-old trade, rice and shipping company called GP Group — accused Federbush of child abduction in May in Manhattan federal court, arguing that he’d reneged on an agreement to move back to Thailand with their 7-year-old son.

The 39-year-old mother claimed in the case that she and Federbush moved to the Big Apple on a two-year trial basis in hopes of saving their failing marriage — while her estranged husband argued that they moved to the city with their child believing it would be indefinite, the court documents say.

Manhattan federal Judge Valerie Caproni sided with Federbush in an Oct. 9 ruling, agreeing that he and Shah permanently relocated to the US and noting that the couple leased apartments, enrolled their son in private education at the tony Buckley School — and promised long-term donations to the school, the court ruling said.

The international couple met in Thailand in 2008, had a ceremonial wedding in Turkey in 2010 and officially tied the knot in 2012 with Shah’s father — “who controlled the family purse” — forcing them to sign a prenup, the court papers say.

The couple lived in Bangkok in an apartment bought by Shah’s parents and later in a family compound, and “these years were rife with marital conflict,” in part, Federbush said, because of her “controlling patriarch” father, Caproni’s decision read.

By 2013, they began fighting and sleeping in separate beds. So as a Hail Mary, the couple moved to New York in August 2017 where “their marriage briefly improved” — but by summer 2018, Shah told Federbush she wanted to split, the decision said.

They fought over taking their son on trips to Thailand because Federbush worried his father-in-law wouldn’t let his grandson return to New York after, on one occasion, taking and refusing to return his grandkid’s passport for several days, the court papers say.

“Shah offered inconsistent and unbelievable testimony regarding the central point of her petition — the two-year condition — and the greater weight of evidence supports [Federbush’s] narrative that the parties intended to move to New York indefinitely,” Caproni wrote in her decision.

Shah also filed a custody case in Thailand this summer, which she may have done “because she thought [a Thai court] would be more sympathetic to her than a New York court,” Caproni said.

She has been in Thailand since September and doesn’t plan to return until the end of November, Federbush’s lawyer, Bernard Clair, said.

“Her decision to be gone during this critical time period is relevant to his decision that she is not an appropriate custodial candidate,” Clair said.

“We have come to believe that the mother brought this bogus claim that he had kidnapped the child because her father wanted her to and she is under his thumb,” Clair said. “And she thought by doing so it would increase her chances of being a true co-parent in Thailand and when both of those tactics miserably failed it really opened Mr. Federbush’s eyes to the type of parental judgment that this woman would exercise.”

Shah’s lawyer, Marilyn Chinitz, said Shah “made Olympian efforts to negotiate a resolution that would be best for the child and the parents,” before the cases began.

“Unfortunately, Mr. Federbush has not expressed that same desire. It is Ms. Shah’s continued objective and her utmost hope that both parties can reach a resolve that is outside of the courtroom,” Chinitz said.

“The proceedings between the parties should be private and for the sake of the parties’ child she hopes that Mr. Federbush agrees.”