 The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter.WASP-3b has such an orbital distance around its star to classify it in the class of planets known as hot Jupiters and has an atmospheric temperature of approximately 1983 K.

WASP-3b undergoes no detectable gravitational tugging from other bodies in this system.The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 3.3°.