The amount of a cysteine and glycine-rich protein 3 (human) when measured in cerebrospinal fluid. The trait is level of cysteine and glycine-rich protein 3 (human) in cerebrospinal fluid (OBA_2058010, an Ontology of Biological Attributes entry). Also known as: cerebrospinal fluid cysteine and glycine-rich protein 3 (human) amount.