Earlier, Mohammad Rizwan was dismissed by Steven Taylor off Netravalkar in a brilliant one-handed catch at slip, followed by Usman Khan off Kenjige, leaving Pakistan at 14/2.
Later, the USA innings ended in dramatic fashion when Nitish Kumar hit a full-toss off the last ball of Haris Rauf for a boundary and the tournament co-hosts were down to 159/3.
Pakistan veteran Mohammad Amir was handed the responsibility of the Super Over but he fielded in a panic, bowling several wides which led to several overthrows, allowing the United States to score 18 runs.
Netravalkar bowled a wide off the third ball of the Super Over but had Iftikhar Ahmed caught brilliantly by Kumar in the deep off the next delivery.
And when seven runs were needed off the last ball, Shadab failed to hit a six, which would have necessitated a second super over.