It was a family affair Sunday at President Trump’s country club in Bedminster, NJ — with the notable exception of his embattled eldest son.

Trump watched the final round of the US Women’s Open golf tournament from a high-security tent with son and daughter-in law Eric and Lara Trump.

First lady Melania Trump and her dad joined them late in the afternoon, followed by daughter Ivanka Trump and her husband, Jared Kushner — just back from the annual summit of media, tech and finance moguls in Sun Valley, Idaho — and their kids.

But Donald Trump Jr. was a no-show amid continuing controversy over his Trump Tower meeting last year with a Russian lawyer and a former Soviet counterintelligence officer.

“If I were Don Jr., I wouldn’t come here either with all the attention he’s getting,” one club member said.

Last week, emails revealed that Trump Jr., Kushner and then-Trump campaign manager Paul Manafort attended the meeting on the promise of getting political dirt on presidential rival Hillary Clinton.

Trump defended his namesake in an early morning tweet that said: “HillaryClinton can illegally get the questions to the Debate & delete 33,000 emails but my son Don is being scorned by the Fake News Media?”

Later, he live-tweeted some of the action on the links, writing: “I am at the @USGA #USWomensOpen. An amateur player is co-leading for the first time in many decades — very exciting!”

Amateur Hye-Jin Choi wound up losing to rookie Sung Hyun Park by two strokes, and Trump — who was wearing a trademark red “Make America Great Again” hat — disappointed many in the crowd by leaving without presenting the silver trophy cup.

Trump’s elevated viewing stand, overlooking the 15th and 18th greens, was festooned with star-spangled bunting and equipped with air conditioning, satellite TV and two walls of bulletproof glass.

Nearby, the clubhouse was thronged by members and outsiders who shelled out $650 a head to nosh on caviar rice pilaf, shrimp, monkfish, sliced sirloin steak and lamb gnocchi.

The open bar featured two specialty cocktails for the event: the “Grey Goose 19th Hole” — a highball with equal parts orange and pineapple juices and a splash of Sprite soda — and the “Bacardi Birdie,” made with lemonade and cranberry juice.​