Shah was tested during the one-day international series between Pakistan and England in the United Arab Emirates in November. The ICC then provisionally suspended Shah in December when the result showed that his sample contained the banned substance chlortalidone.
The ICC says Sunday Shas has "admitted the violation and three-month suspension has been imposed." The ban starts from Dec. 27, 2015, the day Shah was provisionally suspended.
Shah told the ICC he had mistakenly taken his wife's blood pressure medication that was identical in appearance to his own but which contained the prohibited substance.
The ICC accepted that Shah had inadvertently taken the medicine and had no intention of enhancing his sporting performance or to mask the use of another performance-enhancing substance.
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