De Jager made an illegal, no-arms charge into a ruck with eight minutes left of a final-round match, which the All Blacks won 57-15 to achieve a record victory for them against the Springboks.
French referee Jerome Garces reacted by yellow-carding the 2015 South African Rugby Player of the Year, who plays for Bloemfontein-based Super Rugby franchise Central Cheetahs.
However, after reviewing the incident the citing commissioner considered the incident had met the red-card threshold for foul play.
When De Jager was sent to the sin-bin, New Zealand exploited their numerical superiority to score three converted tries through Codie Taylor, Ben Smith and Liam Squire.
Replacement hooker Taylor was yellow-carded in the final minute for a high tackle.
