The defending champions, Thailand, who won the previous fourteen King's Cup, defended their title. Burkina Faso and Belarus made their debuts. Burkina Faso were represented by their African Nations Championship team, composed of domestic league players. Belarus were represented by their B-team, composed of domestic league players. North Korea were represented by several their B-team and a few A-team players.
The draw will be held on 3 July 2017, at the Thairath Headquarter in Bangkok, Thailand. Suppasin Leelarit, vice president of Football Association of Thailand and Watchara Watcharapol, chief executive officer of Thairath TV will participate in the draw.
The 4 teams are drawn into two matches, with hosts Thailand being allocated to bottom half (semi-finals 2).
The Union of European Football Associations (UEFA) sent a letter of confirmation to the Football Association of Thailand. UEFA has no objection to participation of Belarus (domestic-league players) in this tournament.
The Football Federation of Belarus will register for the tier-2 international match, which will record the result without FIFA scoring. The remaining three teams will register for the tier-1 international match.