In Sweden, approximately 1,200 individuals die by suicide annually. Inpatient suicide is considered rare, but death by suicide still occurs when admitted to a psychiatric hospital. This study was part of a national retrospective project covering data from all patients’ medical records for the 2 years before death by suicide in 2015. In this study, 41 patients who died by suicide while being admitted to psychiatric care were identified. The aim was to retrospectively identify documentation of suicide risk, safety measures, and comparisons between those with and without suicide attempts for patients who died by suicide during psychiatric inpatient care. There was documentation of suicidal variables in 80% of the patients; 59% had a previous known suicide attempt, 63% were diagnosed with mood disorders, and 41% were assessed for elevated suicide risk. The most common suicide method was hanging, suffocation (68%), and 22% had died by suicide within 24 h after admission. Almost three-quarters were on voluntary care. No patients had constant professional supervision on a one-to-one basis, and 17% had 15-minute checks. One-third were on agreed leave at the time of the suicide. These results emphasise the lifesaving role of high-level supervision in the early stages of inpatient care.