Introduction: A major cause of mortality and morbidity, malnutrition also increases the duration of hospital stay and costs. Therefore, the early diagnosis and detection of those patients at risk is important. Many malnutrition screening tests are available for the detection of those patients. The validity and reliability of the commonly used tests, Nutritional Risk Screening (NRS)-2002 and Mini Nutritional Assessment (MNA) have been proven in the diagnosis of malnutrition in hospitalized patients. A new malnutrition diagnostic criterion called the Global Leadership Initiative on Malnutrition (GLIM) was created by an initiative of the same name as these criteria in 2018. The aim of the present study is to evaluate the differences and superiority of MNA, NRS-2002 screening tests and GLIM criteria in patients hospitalized in palliative care with a diagnosis of malnutrition.Material and method: 148 patients who were hospitalized in palliative care due to clinical malnutrition were included in the study. MNA, NRS-2002 and GLIM screening tests filled out by dieticians for each patient within the first 48 hours of hospitalization. Within the framework of GLIM criteria, patients were recorded for weight loss from phenotypic criteria based on information obtained from their relatives (more than five percent in the last six months or ten percent or more over the last six months). Hand dynamometer and calf circumference measurements were made to show muscle loss. Hand grip power was measured three times in both hands using a Jamar Digital Hand Dynamometer and the highest value was recorded. Hand grip power cut-off value was accepted as