Tetteh knocked down Aaron Boupendza of Gabon as players and officials traded blows after the game in an unsavoury fracas.
He was red-carded when the referee was informed of the incident by VAR but refused to come out of the changing rooms to bw shown the card after the Group C clash in Yaounde.
The Confederation of African Football on Saturday handed the 24-year-old, who had only been on the field for the last three minutes as a substitute, an extra one-match suspension for violent conduct on top of the automatic two-match ban.
