The 21-year-old gained experience on loan at SC Freiberg in Germany last season and will now join OH Leuven, who are also owned by the Thai King Power group.
Kapustka is a full Polish international with 14 caps and three goals.
August 31, 2018
He now links up with former Leicester City manager Nigel Pearson’s OH Leuven side, who currently play in the second tier of Belgian football and occupy second spot in the table after an impressive opening three fixtures.
Kapustka will be eligible to make his debut for OHL in Saturday’s home game against Westerlo, where he could feature alongside fellow Leicester City loanees Elliott Moore and Kamal Sowah.