The ineligibility period would also be reduced to one month, if Gesabwa would complete a substance abuse treatment programme approved by the AIU.
In defence, Gesabwa said that he drank team during meals at his hotel in Lima which could have been the source of the substance but unknown to him.
A traditional South American drink, Coca tea, caused a Kenyan athlete based in Mexico to be banned for doping.
Rodgers Ondaji Gesabwa, a 36-year-old Kenyan road runner affiliated to the Federation of Mexican Athletics Associations (FMMA) was suspended from athletics for three months from July 10 to October 10 for presence of a prohibited substance cocaine metabolite, benzoylecgonine in his urine, Athletics Integrity Unit (AIU) said on Wednesday.