This umbrella review investigates the reasons behind missed nursing care and how nurses prioritize the care they miss. Missed nursing care refers to essential nursing activities or tasks that are omitted or not completed as planned during a patient's care. Factors contributing to missed care include staffing shortages, organizational issues, and a poor working environment. Nurses prioritize care based on acute needs, education, and experience. Missed nursing care negatively impacts patient safety, the quality of care, and the well-being of healthcare professionals. Organizational characteristics, nursing unit features, and teamwork among staff significantly influence missed nursing care. Individual factors such as staffing levels, professional roles, and work schedules also contribute to missed care. The review highlights the importance of adequate staffing, effective teamwork, and communication in preventing missed nursing care. It also emphasizes the need for further research on managing patient needs and nurse prioritization. The study concludes that missed nursing care is a complex issue influenced by multiple factors, and addressing it requires a comprehensive approach involving organizational, individual, and systemic changes. The findings underscore the importance of ensuring adequate staffing, effective teamwork, and communication to improve patient care and safety.This umbrella review investigates the reasons behind missed nursing care and how nurses prioritize the care they miss. Missed nursing care refers to essential nursing activities or tasks that are omitted or not completed as planned during a patient's care. Factors contributing to missed care include staffing shortages, organizational issues, and a poor working environment. Nurses prioritize care based on acute needs, education, and experience. Missed nursing care negatively impacts patient safety, the quality of care, and the well-being of healthcare professionals. Organizational characteristics, nursing unit features, and teamwork among staff significantly influence missed nursing care. Individual factors such as staffing levels, professional roles, and work schedules also contribute to missed care. The review highlights the importance of adequate staffing, effective teamwork, and communication in preventing missed nursing care. It also emphasizes the need for further research on managing patient needs and nurse prioritization. The study concludes that missed nursing care is a complex issue influenced by multiple factors, and addressing it requires a comprehensive approach involving organizational, individual, and systemic changes. The findings underscore the importance of ensuring adequate staffing, effective teamwork, and communication to improve patient care and safety.