Yevhenii Lubnenko, 29, David Carneckij, 28, and a 16-year-old boy are accused of going on to the playing area at a football match.
The 33-year-old suffered a troublesome calf injury in March.
Demin, 18, is arguably the most notable prospect to ever commit to the BYU basketball program.
All the latest news, rumours, gossip and deals as the summer window approaches