Being a cross-national analysis, the aim of this study, which draws on data from school principals, is to evaluate parents' involvement in decision-making processes comparatively in Turkey, Germany and France, which are members of the Organization for Economic Cooperation and Development (OECD) and were included in the study in terms of some variables, such as data in Human Development Index (HDI) report 2016 and results of the Programme for International Student Assessment (PISA) 2015 reading skills, math and science literacy results' based on demographic, socio-economic, socio-cultural variables as well as achievements in education, population trends and parents' involvement in education. Phenomonology research design from qualitative research methods was used in this study. Data analyses relied on content analysis technique. School administrators from Turkey, Germany and France were included through criteria sampling method from purposeful sampling methods. Interview technique was employed in order to collect data through a semi-structured interview form. The findings of the study highlighted that all participants agree on the positive impact of parents' involvement in decision-making but there are some ambiguity how and what level parents must involve in decision-making processes. Some recommendations are made on how to improve involvement in decision-making process.