Poltergeist III is a terrible movie with lots of flaws and errors, but it's a real same that this was Heather O'Rourke last role before her tragic death.

In this film alone, Carol Anne's name is spoken a total of 121 times.

“We’re back!” Atrocious garbage, Poltergeist III has no idea what it’s doing. This installment finds Carol Anne sent off to live with her aunt and uncle in Chicago, and in therapy for her belief in ghosts; but her treatments unwittingly resurrect the spirit of Kane, who proceeds to attack Carol Anne and her family once again. Heather O’Rourke returns and is joined by Nancy Allen, Tom Skerritt, and Lara Flynn Boyle. Yet despite the strong cast, the writing is incredibly bad; with a convoluted plot and characters that make no sense (things just happen without reason). There are some interesting ideas with mirrors and doppelgangers, reality and illusion, but none of it ever develops into anything. Sadly, Poltergeist III’s production was mired in tragedy, however there’s no excuse for such incompetent filmmaking as this.

I don't think it is as terrible as its reputation makes you believe. The practical mirror effects are creepy but ultimately it has some serious flaws including the over 100 times the name "Carol Anne" is cried out. A serious step down from both that preceeded it, but much better than the reboot could even dream to be.

I would prefer even watching the Poltergeist remake. Carol Anne’s family gave her away to live with her Aunt and Uncle ? That’s one reason I hate this one.

Loses the majority of the cast and suffers for it, but it makes up a lot with Tom Skerrit and Nancy Allen. This isn't nearly as bad as most claim. I may be biased though, as I watched it at a young age, and at the time I was living in a condo similar to the one in the movie.