Sulfotransferase that utilizes 3'-phospho-5'-adenylyl sulfate (PAPS) as sulfonate donor to catalyze the sulfate conjugation of quercetin, rhamnetin and isorhamnetin but not kaempferol. O-sulfation of position 3 of flavonol. May play a role in auxin transport. Highest in shoot tips and lowest in mature leaves and roots. Belongs to the sulfotransferase 1 family.