Remarkably, Fishlock exits the international stage having played in just over two-thirds of the 246 matches in the history of Wales' women's football team.
In time the ratio will dwindle, of course, but the memory of her contribution will not fade any time soon.
Captain Angharad James says Fishlock's legacy will be similar to the one left by Gareth Bale, the talisman of the Wales men's team who retired in 2023.
Bale was the key player as Wales reached three men's major tournaments in six years, while Fishlock crowned her international career by appearing at Euro 2025.
Wales may have lost all their games in Switzerland, but just getting to a first major tournament was a triumph given the seismic progress made since Fishlock's international debut in 2006.
Wales' finest moment at the European Championship was their maiden goal, which was scored, fittingly, by Fishlock.
Even at 38, she remained Wales' key player, the one most likely to provide a moment to change a game.
As was the case with Bale, the challenge of filling the void Fishlock's retirement will leave is a daunting one.