Shinwari rattled the top order as he scalped three of the opening five wickets.
Pakistan left out pace bowler Mohammad Amir from their 15-man Twenty20 international squad to face Australia.
He also wants the ICC to consider changes to ensure 'doosra' stays in the sport
The PCB banned Shehzad for violating anti-doping regulations after he tested positive for a prohibited substance in May and his suspension was scheduled to end on November 10.
Pakistan go into the World Cup having suffered 10 successive ODI defeats and were also beaten by Afghanistan in the warm-up match of the World Cup.
Pakistan pacer Umar Gul failed to impress the national selectors in his comeback bid.
Saleem, 20, has yet to represent the national team in any format while Rasooli has shown strong form in the Shpageeza Cricket League, Afghanistan's domestic T20 tournament, after recovering from a finger injury.
Inzamam-ul-Haq announced his decision to step down as Pakistan's chief selector when his contract expires on July 31.
India, Pakistan, Sri Lanka, Afghanistan and Bangladesh can beat each other on their day
None of the players attending the camp are being tested for COVID-19 but only those who haven't shown any symptoms like fever, have been allowed to join.
The selectors have also put Bilal Asif, Imran Butt, Musa Khan and Mohammad Nawaz on standby to cover for any player who fails pre-tour COVID-19 Testing scheduled later this month.
Six of the 10 Pakistan cricketers bound for England who tested positive for COVID-19 have now registered negative results on re-testing, the Pakistan Cricket Board (PCB) said on Saturday. Mohammad Hasnain, Shadab Khan, Fakhar Zaman, Mohammad Rizwan, Mohammad Hafeez and Wahab Riaz, however, must return a second negative result before they can join the main squad of 20 players who will leave for England on Sunday.
Batsman Fawad Alam, who was also named in the 20-member squad along with two specialist spinners could make a comeback to Pakistan's Test team after 11 years.
The infected players will go into self-isolation.
Waqar Younis said that he is worried that players in Pakistan might face mental health issues if cricket continued to be played for more time in the COVID-19 situation.
The 34-year-old replaced Iftikhar Ahmed, who managed only 44 runs in four innings in the recent tour of Australia where Pakistan lost both Tests.
Sri Lanka trounced top-ranked Pakistan 3-0 after a 13-run victory in the third and final Twenty20, in front of 27,000 fans at the Gaddafi Stadium, in Lahore, on Wednesday. Needing 54 runs off the last five overs, with eight wickets in hand, Pakistan again stumbled in its run-chase for the third successive time in the series and were restricted to 134-6.
Flamboyant all-rounder Shahid Afridi earned Pakistan a three-wicket victory over Sri Lanka in the first Twenty20 international at Dubai stadium on Wednesday.
Rajneesh Gupta profiles the cricketers playing the World Cup 2019.
The International Cricket Council released the provisional squads of the 12 teams for next year's World Cup in Australia and New Zealand on Friday. However, co-hosts Australia and minnows Ireland decided against releasing the provisional list although they submitted 30 names to the parent body within the stipulated deadline.
Rajneesh Gupta presents all the fascinating career numbers of players in the World Cup.