Walker made his debut in the Australian Goldfields Open thanks to beating Jamie Cope 5–2, Adam Duffy 5–3 and Gary Wilson 5–3 in the qualifiers, but was thrashed 5–0 by Stephen Maguire in the first round. He was whitewashed in the opening round of two other ranking events, 6–0 by Joe Swail at the UK Championship and 4–0 by Marco Fu at the Welsh Open.&lt;ref name="2015/16"&gt;&lt;/ref&gt; Walker entered Q School as he dropped off the tour at the end of the season by being placed 80th in the world rankings. He only won one match during the two events to confirm his relegation.