A man wanted for questioning in last week’s execution-style murders of a couple outside a Queens cemetery killed himself last night after a standoff with cops, sources said.

The man, whose identity was withheld, was barricaded in his Brooklyn apartment when cops arrived at around 6 p.m.

As police stood outside, they heard a shot fired in the residence on Menahan Street in Bushwick. He died instantly.

The bodies of Lenny Archipolo, 47, and his girlfriend, Yomarya Santiago, 23, were found Oct. 28 in a car parked next to Linden Hill Cemetery in Ridgewood.

Each had a gunshot wound to the back of the head.