A 30-year-old patient comes to the emergency department after being found sitting on a park bench, staring blankly ahead. Upon assessment, the nurse notes the patient has expressed feelings of hopelessness, references plans for ending their life, and states they have 'nothing to live for.' What is the priority nursing intervention?
Recommend the patient engages in physical activity to improve mood.
Discharge the patient with a follow-up appointment.
Initiate a detailed suicide risk assessment.
Provide reassurance and encourage the patient to talk about their feelings.