Study aim: Determining the Effectiveness of Mindfulness-Based Cognitive Therapy on Character Strengths, Irrational Beliefs, and Self-Suppression in Women Seeking Divorce Design: This is a randomized, single-blind clinical trial with intervention and control groups, using block randomization, with a total sample size of 45 participants. Settings and conduct: The present study included all women seeking divorce in Ahvaz during the second half of 1404 (2025–2026). Eligible participants will be randomly assigned to the intervention and control groups using block randomization. Participants will be blinded to their group allocation, while the researchers will be aware of the group allocation. Participants/Inclusion and exclusion criteria: Inclusion criteria: Having an educational level higher than a high school diploma; Providing informed consent to participate in the study; Being in the process of divorce; Seeking services at family counseling centers with a serious intention to pursue divorce. Exclusion criteria: Having a history of severe psychiatric or cognitive disorders; Receiving concurrent psychotherapy services or participating in another psychological intervention program; Having a history of participating in formal mindfulness-based cognitive therapy courses or similar intervention Intervention groups: Intervention group: Women seeking divorce who are assigned to this group will receive mindfulness-based cognitive therapy (MBCT) through regular sessions and according to the treatment protocol. The aim of this intervention is to evaluate its effectiveness on participants’ character strengths, irrational beliefs, and self-suppression. Control group: Women seeking divorce who are assigned to the control group will not receive mindfulness-based cognitive therapy during the intervention period Main outcome variables: character strengths, irrational beliefs, and self-suppression.