Radradra was sent off after 20 minutes of Sunday's 24-19 victory in Cardiff for a dangerous hit on opposition full-back Cameron Winnett.
He will miss games against Spain on Saturday and Ireland a week later, the Pacific Islanders' final games of the November Test window.
If the 21-time capped midfielder completes a World Rugby's coaching intervention programme he could return to action with his French club Lyon against Pau on November 30th.
