A spokesman of the PCB said Shinwari would join the team tomorrow and will be available for the first match to be played on the same day.
"Usman Khan has been included in the national T20 side after consultations between the selectors and the team management," the spokesman said.
Pakistan's Test and One-day captain, Misbah-ul-Haq had hinted recently that the youngster from the Khyber Agency in the Khyber Pakhtunkhawa province could be inducted into the national team after he came up with an amazing spell of five for nine in the final of the national T20 championship in Lahore.
"It is a dream come true for me. I was not expecting this call up but mentally I am prepared for this challenge if I get a chance to play," Usman said.
Also Read
The pacer, who just finished a first class match of the President's Cup, said playing for Pakistan would be the ultimate challenge for him.
Usman has played just four first class since making his debut this year in a Ramazan cricket T20 tournament in Karachi.
Pakistan will play two T20 Internationals on December 11 and 13, followed by five One-day Internationals and three Tests in the United Arab Emirates.