The amount of a NAD-dependent protein deacetylase sirtuin-3, mitochondrial when measured in blood serum. The trait is level of NAD-dependent protein deacetylase sirtuin-3, mitochondrial in blood serum (OBA_2044358, an Ontology of Biological Attributes id). Also known as: blood serum NAD-dependent protein deacetylase sirtuin-3, mitochondrial amount.