Some participants, as a result of random selection, will be asked to participate in four, 45-minute sessions that will occur on four separate days while on the Inpatient Psychiatric Unit (IPU). These four sessions are in addition to the standard IPU treatment and are experimental. These four sessions will include mindfulness meditation practice and education, creating a Crisis Response Plan, and a brief introduction into self-compassion. As stated above, practicing mindfulness means focusing attention on what is occurring in the present moment in a non-judgmental way. The focus may be on what one is seeing or hearing or physical sensations, such as touch, as well as thoughts and emotions. Meditation is just sitting quietly and practicing mindful awareness.

Participants will be asked to fill out several short paper and pencil tests to assess your response to the treatment (10 to 15 minutes) pre-intervention and immediately post-intervention while on the Inpatient Psychiatric Unit (IPU), as well as a follow-up phone call or mail one month after discharge from the IPU. All participants will receive the IPU's normal standard of care treatment (for study purposes this called treatment as usual).

This intervention will consist of four, 45 minute individual mindfulness training sessions (one session per day, over a range of 12 subsequent days) provided by a trained mindfulness facilitator.

Determine if there is a significant difference in the Columbia Suicide Severity Rating Scale, among the MB-SI + TAU cohort compared to the TAU only cohort. The total Columbia Suicide Severity Rating Scale score can range from 0 to 25, with higher values indicating greater intensity. Longitudinal generalized linear mixed models will be used for the primary analyses. We estimate a total of two time points (baseline and one month follow-up) for the primary outcome.

Demographic data extraction will include gender, age, race, ethnicity, religious preferences, service branch, service connection, percent of service connection, diagnosis of psychiatric disorders, substance abuse disorder (SUD) diagnosis, medical diagnosis, and medical diagnosis. In addition, the following factors will also be tracked: the group the participant has been placed in, admission date, consent date, the four intervention dates ( if participant is placed in the treatment group), post-intervention date, and one-month post-intervention date.