"Camp Rock" star Meaghan Martin is open to being in a potential third film ... despite having a bad on-set experience filming the sequel years ago.

Meghan -- who portrayed Tess Tyler in the first two films -- plays coy on whether "Camp Rock 3" is happening and if she's been asked to participate ... but says she'd be intrigued if invited to reprise her role, and says it could be "healing" for everyone involved.

She says her character deserves justice, given her "Camp Rock 2: The Final Jam" storyline -- where she bullies the new girl and stirs up chaos at the song-filled summer camp.

Speaking of bullying ... in 2022, Meghan posted on IG saying she was "bullied and manipulated by men at least 2x my age," and had a really difficult time filming the sequel.

Her "Camp Rock" co-star Alyso

See Full Page