On 14 February 2013, the WPBSA brought charges against Lee concerning his group matches at the 2008 Malta Cup, two matches at the 2008 UK Championship, his match at the 2009 China Open, and a match at the 2009 World Snooker Championship. He was charged with violating sections 2.8 and 2.9 of the Members Rules and Regulations, which concern divulging information not already in the public domain with the express purpose of it being used for match-betting, and entering into an arrangement to influence the result of a game. Lee applied for permission to play in the 2013 World Championship in the event that the proceedings against him would be brought to a close before the draw was made, but it later transpired that he would be unable to participate in the tournament after learning that his hearing would not take place before the qualifying draw. On 10 April, the WPBSA announced that they would no longer be proceeding with the investigation into the Premier League match, although the inquiry into the remaining match-fixing charges would still go ahead. While suspended from WSA tournaments, Lee continued to compete in independently organised events, winning the RKGKhar Gymkhana Snooker Masters in May.