Coach Vladimir Petkovic included Shaqiri in a 23-player squad for two home matches this month.
Switzerland hosts Estonia in a European Championship qualifier at Lucerne next Friday, and the U.S. in a friendly at Zurich four days later.
Switzerland is third in a six-team Euro 2016 qualifying group, trailing six points behind leader England. The top two advance to the finals in France, and third place earns at least a playoff.
Goalkeepers: Yann Sommer (Borussia Moenchengladbach), Roman Buerki (Freiburg), Marwin Hitz (Augsburg)
Defenders: Stephan Lichtsteiner (Juventus), Johan Djourou (Hamburger SV), Steve von Bergen (Young Boys), Fabian Schaer (Basel), Francois Moubandje (Toulouse), Fabian Lustenberger (Hertha Berlin), Ricardo Rodriguez (Wolfsburg), Silvan Widmer (Udinese)
Midfielders: Valon Behrami (Hamburger SV), Blerim Dzemaili (Galatasaray), Gokhan Inler (Napoli), Gelson Fernandes (Rennes), Fabian Frei (Basel), Pajtim Kasami (Olympiakos), Granit Xhaka (Borussia Moenchengladbach), Valentin Stocker (Hertha Berlin), Xherdan Shaqiri (Inter Milan)
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