's Hummer was found abandoned after apparently slamming into a parked car in the Hollywood Hills this week ... but even though cops classified the accident as a hit-and-run, Wes is NOT considered a suspect.
Law enforcement sources tell TMZ, since it's just a misdemeanor hit-and-run with relatively minor damage -- and nobody witnessed the crash -- the Puddle of Mudd singer can't be considered a suspect ... at least not yet.
We're told cops received a call about the hit-and-run soon after it happened Monday, and when they arrived on scene they discovered Wes' black Hummer damaged and missing its front wheel ... as well as the parked car it had apparently sideswiped.
It's unclear if Wes was behind the wheel at the time of the accident, but whoever was driving the Hummer took off. Cops only discovered the vehicle was registered to the singer after running the license plate.
Cops followed up at Wes' residence -- on the same street as the accident -- to inquire about what happened, but the singer wasn't home. The Hummer has since been impounded ... and the singer will have some serious explaining to do whenever he decides to pick it up.
Scantlin's attorney tells TMZ ... "For as long as I've known Wes, his normal routine has been taking public transportation, taxi cabs or getting a ride from someone. He never drives. I would be very surprised if he was involved."