Along with Mexico, the three nations have been seeded for tomorrow's draw, meaning that they will be in separate pools for the group stages.
FIFA's Olympic organising committee has finalised the seedings and draw procedure, which doesn't allow European teams to be drawn against rivals from their own continent.
This also applies to countries from Latin America, who will avoid each other in the opening stages of the 16-team tournament.
The nations have been divided into four pots, with one team drawn from each pot being placed into a group. Seeded teams cannot be drawn against each other.
Pot One: Great Britain (seeded); Belarus; Spain (seeded); Switzerland
Pot Two: Brazil (seeded); Mexico (seeded); Uruguay; Honduras
Pot Three: Japan; South Korea, United Arab Emirates; Oman or New Zealand
Pot Four: Egypt; Gabon; Morocco; Senegal or New Zealand