The force of the challenge broke and dislocated Andre Gomes’s ankle at the weekend, much to the Korean’s obvious distress. Replays showed the Portuguese midfielder got his foot stuck in the turf.
Gomes was discharged from hospital on Tuesday following a successful operation.
West Yorkshire official Martin Atkinson initially showed Son a yellow card, but changed it to a straight red after the tackle was reviewed by the video assistant referee.
Son had been due to miss Spurs' next three league matches, but the club successfully appealed against Atkinson's decision on Tuesday.
Sheffield United are due at the Tottenham Hotspur Stadium in the Premier League on Saturday.