Thanawat was born in Suphan Buri but moved to France with his mother when he was young and subsequently obtained French citizenship in addition to his Thai one.
[2] Suengchitthawon spent seven years with local team Neunkirch before signing for Nancy, at the age of 13.
On 19 September 2020, Suengchitthawon joined Leicester City on a free transfer, playing for the side's Development Squad.
[3] He made his first appearance in the Premier League 2 match against Blackburn Rovers on 29 September 2020.
On 12 April 2021, Suengchitthawon was named in manager Akira Nishino’s 47-man squad for Thailand’s 2022 World Cup qualification against Indonesia, UAE and Malaysia, as well as the friendly matches against Tajikistan.