The Exeter wing was making his return from dislocating his shoulder in December, which cost him the chance of making the British and Irish Lions squad.
But Feyi-Waboso lasted less than 40 minutes as he caught Antoine Hastoy on the head while trying to retrieve the ball from his own kick.
The incident was upgraded to a 20-minute red card on review.
An independent foul play review committee ruled on Sunday that the tackle carried a high degree of danger and imposed a three-match ban, reduced to two should Feyi-Waboso complete a coaching intervention programme.
He could therefore return for England's clash against the USA on July 19th in Washington, DC.
France's Cameron Woki was also shown a red card in Les Bleus' 26-24 victory at Twickenham and has been referred to a disciplinary committee for a hearing on Tuesday.