The Middlesex Senior Tournament, held in Southall, is a Badminton England gold graded event – which is the highest level of domestic tournament.
Constable, who was National champion in 2002, had spent two weeks coaching the sport he loves in Hong Kong before arriving back in the UK on Friday, less than 24 hours before the start of the tournament.
Unseeded, the Jersey representative beat sixth seed Josh Young 21-15, 21-15 in the opening round which meant he had to face top seed Sam Parsons in the quarter-finals.
After losing the first game, Constable drew on his many years of experience to defeat Young 19-21, 24-22, 21-16 and progress to the last four.
However, it was at this stage that he was forced to retire with a back injury, gifting the eventual champion Ben Beckman a free path to the final.