Suicide prevention remains a critical concern within mental health care, particularly for individuals with psychiatric disorders. This review examines the relationship between the length of inpatient psychiatric admission and its effectiveness in preventing suicide. The study analyzes existing literature on admission duration, in-hospital and post-discharge suicide rates, and factors influencing these outcomes such as treatment quality, patient characteristics, and post-discharge support systems. While some evidence suggests longer stays may be beneficial for certain diagnostic groups, the quality and intensity of care during admission and robust post-discharge support appear equally crucial. The review highlights the importance of individualized care plans, comprehensive suicide prevention programs, and strong transitional support. It also discusses international perspectives, ethical considerations, and special populations. The paper concludes that an effective approach to suicide prevention should focus on tailored admission lengths, high-quality care, and seamless transitions to community support, rather than solely on extending lengths of stay.