Research on clinical trajectories of children with suicidal ideation (SI) and clinical worsening (CW) during cognitive behavioral therapy (CBT) for childhood trauma is limited. The current study utilized secondary data from a randomized clinical trial comparing Trauma-Focused CBT versus Stepped care CBT to examine (1) clinical profile and outcomes of children with SI, recurrent thoughts of death/dying, and past attempts; and (2) clinical worsening during treatment and difference in outcomes. Children (ages 4-12) and their parents (N = 183) participated and 132 completed treatment. Interviews assessing SI, thoughts of death/dying, past attempts, and number/type of trauma were conducted with children (ages 7-12) and parents. Outcome measures (baseline and post-treatment) completed by parents included child posttraumatic stress symptoms, impairment, and internalizing and externalizing problems and an independent evaluator rated overall severity. Children (ages 7-12), parents and therapists completed ratings during treatment that indicated CW. Results did not differ by treatment group; thus, the pooled sample was used. Children with SI at baseline had higher severity than children without. For completers, no children (n = 14) with SI at baseline had SI at post-treatment. Child (n = 3) and therapist (n = 5) ratings of CW were low. Eighteen children (13.64%) were rated as CW by parents. Most ratings occurred at the beginning of treatment. Children with therapist ratings of CW had higher internalizing problems. Findings suggest that children with SI and CW can improve from trauma-focused CBT. More research is needed on the clinical trajectory of children with SI and trauma, and on clinical tools to monitor CW. Clinical trial registration information: https://clinicaltrials.gov : NCT02537678.