In November 2014, he was called upon to the Singapore national team for the 2014 AFF Championship,[1] which was his first senior international tournament.

After graduation from the Singapore Sports School, he had a burnout and lost passion for the game and almost quit his football path which he set on while at a very young age.

He agreed to play for the Young Lions when they called him up to sign with them, "giving it a last go" before making a final decision on his career path.

Having graduated from Singapore Sports School, Al-Qaasimy joined the Young Lions at the age of 18 whilst continuing his studies in Republic Polytechnic, a local tertiary institution.

[7] Al-Qaasimy scored his first ever professional goal in Geylang's first match of the 2017 S.League season, helping his side to a 2-0 victory over Balestier Khalsa FC.