Miley, in typically hard-working style, was back in the water the morning after her surprise 200m individual medley bronze medal the night before for the 200m breaststroke.
For a woman who had already won 400m IM gold earlier in the championships it underlined the tenacity with which she approaches the sport.
However she could only clock a time of 2.25.81 minutes, enough for 20th overall meaning the diminutive Scot did not progress.
It was a feeling that was shared by the rest of the British competitors in action on the final day of the global showdown in Istanbul.
Miley's 200m breaststroke teammate Sophie Allen celebrated her first swim over the distance for three years with a new personal best of 2:28.77 minutes but she was 28th overall.
Miley and Allen's inability to make the final was a theme throughout the morning across nine individual swims and one relay effort for the British team.
With Georgia Davies, Jemma Lowe and Fran Halsall in action in finals in the evening session it had an end of term feel in Turkey.
Chris Walker-Hebborn (200m backstroke), Roberto Pavoni and Matthew Johnson (200m butterfly) and the men's 4x100m relay team all missed out on qualifying for their respective finals.
Becky Turner was the closest to breaking that duck when she was 11th overall in the 200m freestyle but ultimately she and Ellie Faulkner (22nd) missed out.