1. If you’re currently severely depressed (very low motivation, suicidal ideation), you might need more immediate, intensive support first.
   MBCT can still be added later for relapse prevention.
2. If you have active trauma symptoms (like flashbacks, dissociation), MBCT can be adapted carefully, but jumping straight into mindfulness could feel destabilizing.
3. People with severe cognitive difficulties (due to brain injury, dementia, etc.) might struggle with the cognitive aspects of MBCT.

Good programs and qualified therapists usually screen for this and will recommend adjustments if needed.