Leslie could not win more than one match in any event during the 2013–14 season. He did reach the second round of a ranking event for the first time in his career at the UK Championship by coming back from 4–0 down against Jack Lisowski to win 6–4, a performance he described as the best of his career so far, but he then lost 6–3 against Liang Wenbo in the next round.&lt;ref name="2013/14"&gt;&lt;/ref&gt; Leslie was beaten 10–6 by amateur player Christopher Keogan in the opening round of World Championship qualifying. He was relegated from the main tour as he ended the season ranked world number 101, well outside of the top 64 who remain. Leslie played in Q School to try and win his spot back and succeeded in the second event by defeating Eden Sharav in his final match to earn a new two-year tour card for the 2014–15 and 2015–16 seasons.