Oman defeated Afghanistan A by 15 runs in the third T20I on Friday to take unassailable 3-0 lead in the five-match series.
Sent to bat first by Afghans who won the toss, the hosts posted 171/7 in the 20 overs at Al Amerat Cricket Ground, with Aqib Ilyas (84) and captain Zeeshan Maqsood (40) emerging as top scorers.
Wafadar Momand was the pick of the bowlers for Afghanistan A as he claimed three wickets.
In reply, Afghanistan A 156/7 posted in the 20 overs. Mohammad Shahzad hit 50 while captain Shahidullah and Sediqullah made 45 and 41 each respectively.
The next match of the series will be on Saturday.