DIDDY SCANDAL POISONING BEY'S MARRIAGE

COUNTRY crossover queen Beyoncé and hubby Jay-Z are keeping an unusually low profile after the red-hot launch of her album Cowboy Carter — and tipsters tell The National ENQUIRER escalating abuse suspicions about their close pal Sean “Diddy” Combs are causing major tensions in the twosome’s troubled 16-year marriage!

Sources dish the superstar singer, 42, and her hip-hop mogul man, 54, may be barreling toward a $2.5 billion bust-up due to Jay’s rumored infidelities and his close association with Diddy, who’s facing multiple sexual assault lawsuits and a trafficking probe by the feds.

Music’s power couple appeared to shrink from the spotlight after armed Homeland Security agents raided Diddy’s digs in Los Angeles and Miami on March 25, gathering evidence for what some say is a looming grand jury indictment.