This report presents the third evaluability study conducted by the Independent Evaluation Unit (IEU) of the Green Climate Fund (GCF). The study assesses whether GCF projects and programmes can be evaluated in a reliable and credible manner. It analyses a sample of 20 funding proposals (FPs) approved between B.26 and B.30, providing findings on the evaluability of logical frameworks, indicators, and result measurement systems across various sectors and geographic regions.