Introduction: Cognitive Disengagement Syndrome (CDS), formerly known as Sluggish Cognitive Tempo, is characterized by symptoms such as mental fogginess, low energy, and slowed mental processing. The present study aimed to investigate suicidal behaviors and psychotic-like experiences in adolescents with CDS and compare these findings with those of typically developing peers. Materials and Methods: This descriptive study used a causal-comparative design. The statistical population consisted of adolescents aged 15 to 18 years in Tabriz, Iran. Based on inclusion and exclusion criteria, a sample of 318 individuals was selected using convenience sampling, including 158 individuals with CDS and 160 healthy controls matched for age, gender, and education. Participants completed the Prodromal Questionnaire–Brief Version (PQ-B), the Adult Concentration Inventory (ACI), and the Suicidal Behavior Assessment Scale for Adolescents (SENTIA). Results: The results indicated that adolescents with CDS reported significantly higher levels of suicidal behaviors and psychotic-like experiences compared to their healthy peers. Conclusion: These findings point to the importance of considering CDS as a contributing factor in the assessment and prevention of suicidal behaviors and psychotic-like experiences by mental health professionals.