Gallacher needed a top-two finish to climb above Graeme McDowell in the ninth and final Ryder Cup qualifying spot but he could still get a place in the team as one of captain Paul McGinley's wildcard selections.
He is competing with players including former English world number ones Luke Donald and Lee Westwood as well as Ryder Cup stalwart Ian Poulter.
McGinley will name his wildcards on Tuesday.
Automatic qualifiers for Europe's Ryder Cup team for the match against the United States next month are:
Rory McIlroy (Northern Ireland), Henrik Stenson (Sweden), Victor Dubuisson (France), Jamie Donaldson (Wales), Sergio Garcia (Spain), Justin Rose (England), Martin Kaymer (Germany), Thomas Bjorn (Denmark), Graeme McDowell (Northern Ireland).
(Reporting by Ed Osmond, editing by Alan Baldwin)
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