In this study, the researchers investigated how impulsive personality traits and emotion regulation (ER) problems might affect gambling disorder severity, presence of suicidal thoughts, and comorbid mental health issues. Participants were 249 patients being treated for GD. They answered several questionnaires and had face-to-face interviews with clinical psychologists. There were 166 patients with suicidal thoughts and 83 without suicidal thoughts. Patients with suicidal thoughts were older, had GD at a later age and had more severe GD symptoms. People with impulsive traits and problems with emotion regulation had more severe GD and worse mental health. Having worse mental health increased the risk of suicidal thoughts. Treatment service providers can use this research to help patients deal with their ER problems and impulsive personality traits during GD treatment.