He lost in the last 32 of the Indian Open to Liang Wenbo and at the UK Championship, lost 6–0 in the second round to world number four Judd Trump, having defeated fellow Thai player Thepchaiya Un-Nooh 6–5 in the opening round. Poomjaeng eliminated defending champion Ali Carter 5–4 in the opening round of the German Masters, after having trailed 4–2, but was then beaten in a deciding frame by Xiao Guodong in the second round. His fourth exit in the last 32 of a ranking event this season came at the China Open as Shaun Murphy whitewashed him 5–0. Poomjaeng saw off Zhang Anda and Craig Steadman to stand one match away from playing in the World Championship for the second year in a row, but from 4–2 ahead he lost eight of the last nine frames against 1997 champion Ken Doherty to miss out. He rose 20 spots to be ranked world number 47 at the end of the season.