Involved in abscisic acid (ABA) signaling during seed germination and abiotic stress response. Acts as positive regulator of ABA-mediated inhibition of seed germination, and tolerance to drought and cold stresses (PubMed:26362328). Together with PP2C50 and SAPK10, may form an ABA signaling module involved in stress response (PubMed:28827170). Inhibits the protein phosphatases PP2C06 and PP2C09 when activated by abscisic acid (ABA) (PubMed:24743650). Monomer (PubMed:24743650). Interacts with PP2C50. Binding to PP2C50 is dependent on the presence of abscisic acid (ABA) (PubMed:28827170). Interacts with PP2C30 and PP2C53 (PubMed:26362328). Repressed by abscisic acid (ABA). Plants overexpressing PYL3 exhibit abscisic acid (ABA) hypersensitive phenotype during seed germination. Plants overexpressing PYL3 exhibit tolerance to cold and drought stresses. Belongs to the PYR/PYL/RCAR abscisic acid intracellular receptor family.