A fourth-floor unit in the Tribeca building where the late John Kennedy Jr. and Carolyn Bessette lived for the three years before their deaths has hit the market for $3.97 million.

The couple, who died in a plane crash in the summer of 1999, owned a two-bedroom at 20 N Moore St. with wood floors and access to a roof deck, but it’s not clear exactly which apartment they called home.

The building is also where mourners gathered to place flowers, candles and photos after the couple — along with Bessette-Kennedy’s older sister, Lauren — were killed.

The newly listed pad had asked $4.32 million with a different brokerage last year.

David Letterman currently lives in the building.

The renovated 2,700-square-foot co-op boasts three bedrooms and comes with a hefty $3,500-a-month maintenance fee.

The main focus is a large living room with oversize windows, barrel-vaulted ceilings, columns and high ceilings.

There’s also a chic kitchen and a master suite with a spa-like ensuite bathroom.

The seller is Alastair Andrew Dorian Short, according to property records.

Listing broker Jason Walker, of Douglas Elliman, declined to comment.