|Tender Mercies (1983) [Sue Anne]: Killed (off-screen) in a car accident. We only see a scene of her father (Robert Duvall) getting the news; he then returns home to attend her funeral (closed-coffin, her body is not shown). (Thanks to Mac)
Terminal Choice (Critical List; Death Bed; Trauma) (1985) [Dr. Mary O'Connor]: Suffocated when David McCallum tampers with the hospital computers to turn off her respirator. Her body is shown again later on when Joe Spano visits the morgue.
Siesta (1987) [Claire]: Stabbed repeatedly by Isabella Rossellini after Isabella catches her in bed with Gabriel Byrne.
Johnny Handsome (1989) [Sunny Boyd]: Shot in the chest in a shoot-out with Mickey Rourke in an alley. (Thanks to Robert)
Switch (1991) [Amanda Brooks]: Dies in childbirth in the hospital, with Jimmy Smits by her side.
Bad Company (1995) [Margaret Wells]: Shot in the chest by Laurence Fishburne during a shoot-out in Laurence's apartment. (Thanks to Robert)
Operation: Endgame (2010) [Empress]: Drowned or choked to death when Odette Yustman forces a water-cooler bottle into Ellen's mouth. (Thanks to CS)