Predicted to enable Wnt receptor activity and Wnt-protein binding activity. Acts upstream of or within anterior/posterior axon guidance; commissural neuron axon guidance; and facial nucleus development. Predicted to be located in membrane. Predicted to be active in plasma membrane. Is expressed in central nervous system; neural plate; neural tube; neurons; and trigeminal ganglion. Human ortholog(s) of this gene implicated in Williams-Beuren syndrome and schizophrenia. Orthologous to human FZD3 (frizzled class receptor 3).