The in-form Garcia moved above Konta into the eighth and final qualifying spot for the season-ending tournament in Singapore with back-to-back tournament victories in Asia.
The British number one's withdrawal from next week's event in Moscow means France's Caroline Garcia now takes the final berth in the field for the WTA Finals in Singapore the following week.
The left foot issue that has forced her out of the Kremlin Cup, which begins on Monday, is the same problem which caused the 26-year-old to miss the recent Hong Kong Open.
Last year, Konta suffered similar frustration after narrowly missing out on a place in Finals.
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Or it could simply be a move to sure up a positional group that's had more than it's fair share of injury concerns as of late. The coaches credited him with seven tackles, two tackles for loss and a quarterback pressure in the first four games.
In 2016, Konta's fate was also sealed at the Kremlin Cup as a win for Svetlana Kuznetsova in the final against Daria Gavrilova ensured the Russian took the final qualifying place.
Konta, who has lost her last five matches, must now decide whether to accept an alternate place in Singapore, which would see her take the spot of any player forced to pull out.
Caroline Wozniacki (13/2), Venus Williams (8/1) and French Open victor Jelena Ostapenko (8/1) complete the eight-woman field.
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