I know there are many children who play football with this passion, and they should not be failed on any account.” Saadullah was born in the town of Pishin, in the Balochistan province of Pakistan.
[3] He played for Khan Research Laboratories between 2011 and 2014, winning the Pakistan Premier League title in 2011–12, 2012–13, 2013–14 and Challenge Cup in 2011 and 2012.
The move would also make him the first Pakistani men footballer to play in Maldives, after female international Hajra Khan.
After the restoration of departmental sports in Pakistan, SSGC terminated contracts of the players of the squad on 26 August 2022, including Saadullah.
[23][24] Khan made his senior debut for the Pakistan national football team in 2014 at the age of 19, in a 3–1 defeat against Lebanon.
[25] He also was included in the Pakistan squad for test matches against Malaysia under-19 and under-22 in Kuala Lumpur, and Osotspa FC and Thailand under-23 in Bangkok in 2015.
[30][31] Saadullah along with other national team players meanwhile participated with Pakistan during local Leisure Leagues exhibitions matches involving Brazilian star Ronaldinho and Ryan Giggs in 2017.
[32][33] In 2018, Saadullah participated in the Pakistan tour to Bahrain for test matches as a preparation for the 2018 SAFF Championship, when his side returned to the international circuit after 3 years, where he scored a goal in a 2–0 victory against Sitra Club.
[6] After the suspension was lifted on 29 June 2022, Saadullah along with his teammate Saddam Hussain were excluded from the national football team camp, as they were unable to attend the trials of the national team where they were named, following the return to international football due to their ongoing court case against their former departmental club SSGC.