The striker is forced to serve a one-match suspension after picking up a fifth yellow card of the season.
Richarlison was booked in last Sunday's 3-0 defeat at Manchester City for a rash challenge on Kyle Walker.
It added to the attacking problems at Goodison Park, with Dominic Calvert-Lewin absent with a quad injury and Demarai Gray earlier limping off at City with an aductor problem.
Worryingly, the Brazilian has gone into the book five times in just eight matches in the 2021-22 campaign.
During his time on Merseyside, Richarlison accrued a total of 15 yellows and was sent off last season in the 2-2 Merseyside derby draw with Liverpool.
Players in the Premier League are handed a one-match ban before full-time of the game of the season.
As things stand, that is Everton's home clash with Leicester on Sunday 19 December.
Who else is at risk?
Rafa Benitez will be hoping Lucas Digne does not pick up any further bookings between now and the clash at Burnley on Boxing Day.
The France international can only afford to be cautioned once more during that period.
Digne has been handed three yellows already this season.
He's also gone into the book three times.
The Blues also currently have Mason Holgate serving the second of a three-match suspension at Brentford. He was handed a straight red card in the 0-0 draw against Tottenham earlier this month.
Here's a look at every Everton player who has been cautioned this season in the Premier League.
Richarlison - 5
Lucas Digne - 3
Abdoulaye Doucoure - 3
Seamus Coleman - 2
Allan - 1
Ben Godfrey - 1
Fabian Delph - 1
Anthony Gordon - 1
Yerry Mina - 1
Jordan Pickford - 1
Salomon Rondon - 1
Andros Townsend - 1