The amount of a small nuclear ribonucleoprotein Sm D3 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes term OBA_2058311 (level of small nuclear ribonucleoprotein Sm D3 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid small nuclear ribonucleoprotein Sm D3 (human) amount.