Background: Determination of the factors affecting missed nursing care and the impact of ethical leadership is important in improving the quality of care. Aim: This study aims to determine the missed nursing care and its relationship with perceived ethical leadership. Research design: A cross-sectional study. Participants and research context: The sample consisted of 233 nurses, of whom 92.7% were staff nurses and 7.3% were charge nurses, who work in three different hospitals in Turkey. The study data were collected using a (...) personal and professional characteristics data form, the Missed Nursing Care Survey, and the Ethical Leadership Scale. Ethical considerations: The study was approved by the non-interventional ethics committee of Dokuz Eylül University Ethics Committee for Noninvasive Clinical Studies. All participants’ written and verbal consents were obtained. Findings: The most missed nursing care practices were ambulation, attending interdisciplinary care conferences, and discharge planning. According to the logistic regression analysis, sex, the number of patients that the nurse is in charge of giving care, the number of patients discharged in the last shift, and satisfaction with the team were determined as factors affecting missed care. No significant relationship was found between ethical leadership and missed nursing care, and a weak but significant relationship was found between the clarification of duties/roles subscale and missed nursing care. Discussion: Ethical leaders should collaborate with policy-makers at an institutional level to particularly achieve teamwork that is effective in the provision of care, to control missed basic nursing care, and to organize working hours and at the country level to determine roles and to increase the workforce. Conclusion: The results of this study contribute to the international literature on the most common type of missed nursing care, its reasons, and the relationship between the missed care and ethical leadership in a different cultural context. (shrink)