To examine the efficacy and feasibility of employing mindfulness interventions to address suicidal ideation within individual counseling contexts, this study utilized a single-subject A-B-A design. Two eligible participants were selected and interventions inspired by “On the Mindfulness Eighth Day” were implemented. Continuous assessment of suicidal ideation and psychological pain was conducted, employing visual analysis and non-overlap of all pairs, alongside written interviews, to evaluate the intervention's efficacy, safety, and acceptance. Results indicated that participants did not experience significant adverse reactions to the intervention, achieving a state of "calmness," fostering acceptance, and eliciting insights. Overall, the intervention was well-accepted; a positive shift from increasing to decreasing trends in suicidal ideation was observed, with one participant showing a separation between suicidal ideation and psychological pain. This suggests that the structure and content of "On the Mindfulness Eighth Day" can be effectively adapted for interventions targeting suicidal ideation in individual counseling settings.