The aim of this study was to assess the effectiveness of a mindfulness-based training program in improving marital adjustment and reducing impulsivity among Iranian couples. The study used a quasi-experimental design with two groups: experimental and control. The sample of the current study consisted of 16 married couples from the city of Tehran, totaling 32 participants. The participants were randomly assigned to two groups, experimental and control, with each group consisting of 8 couples. The results indicated the effectiveness of the mindfulness program in enhancing marital adjustment, with the posttest mean rising to (2.86), and the average impulsivity score decreased to 2.59, indicating a significant reduction in impulsivity among Iranian couples. Mindfulness-based therapy directly affects participants’ ability to regulate immediate emotions. This increased awareness significantly helps in managing harmful mental behaviors such as impulsivity, substance abuse, and poor adaptability. Future research should investigate the broader effects of mindfulness on mental and behavioral outcomes, with a focus on addressing impulsivity in young couples. Additionally, incorporating mindfulness-based therapy for couples both before and during marriage could enhance interpersonal relationships and overall quality of life.