The function of Ensembl gene identifier ENSG00000168939 (SPRY3, sprouty RTK signaling antagonist 3) is as follows. Inhibits neurite branching, arbor length and neurite complexity (By similarity). Inhibits EGF-mediated p42/44 ERK signaling (By similarity). Negatively regulates the MAPK cascade, resulting in a reduction of extracellular matrix protein accumulation (PubMed:30878395). May function as an antagonist of fibroblast growth factor (FGF) pathways and may negatively modulate respiratory organogenesis (PubMed:9458049). {ECO:0000250|UniProtKB:Q3UUD2, ECO:0000269|PubMed:30878395, ECO:0000269|PubMed:9458049}.