Real Madrid were winning 2-1 in Amsterdam when Ramos played for a yellow card on goal so that he could miss the second leg and be free of the threat of suspenson in the later stages of the competition.
The center back has been found guilty by CEDB for planning to avail himself for important games, the quarter finals by earning the Ajax booking to prevent future suspension.
Mere minutes after Marco Asensio put Real 2-1 up in the 87th minute, the Real Madrid skipper clattered Kasper Dolberg very blatantly and got himself in the book for the 38th time in the Champions League - and the 201st time in his Los Blancos career.
Following an investigation opened by Uefa Ramos was handed an additional one match for obtaining the booking on objective.
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As a result of the booking, the 32-year-old was suspended from next Tuesday's second leg.
Speaking after the game, the Real Madrid captain admitted to reporters than he had got himself booked on objective.
"If I wanted to force the suspension then I'd have done it in the group stage", explained Ramos.
Real Madrid will be starting to think about their second leg against Ajax already, even though they're only halfway through a league and cup double-header against Barcelona.
News of the additional ban is perhaps not a surprise for Ramos after Valencia midfielder Geoffrey Kondogbia was given a two-match ban by UEFA for being booked deliberately in a Europa League meeting with Celtic.