 Nyora kupfuurira kweiyi ndima - Bärtschi akatamba nechikwata chenyika cheSwitzerland chevadiki pazviitiko zvina. Akatamba mumakwikwi epasi rose eUnder-18 muna 2009 na2010, achihwina chibodzwa uye zviviri zvinobatsira mumakwikwi ese ari maviri zvikwata zveSwitzerland zvakapedza munzvimbo yechisere neyechishanu zvichiteerana. Akabva aonekwa nechikwata cheUnder-20 pa2011 World Junior Ice Hockey Championships, achihwina chinangwa uye kubatsira mune imwe nzvimbo yechishanu. Akadzokera kumakwikwi e2012, asi akaonekwa mumitambo miviri chete asati atambura nekushungurudzika kwakamumanikidza kubuda mumutambo uyu. 