Kammala wannan jumla: Leantsiuk ya zama na uku a gasar zakarun Belarus a 2003 kuma ya lashe lambar yabo ta kasa ta matasa tare da sabon mafi kyawun jefawa. Ta kasance ta biyu ga kishiyar Rasha Anna Avdeyeva a gasar zakarun Turai ta matasa ta 2003. Ba ta inganta ba a shekara ta 2004 <unk> shekarunta na farko na cikakken gasar zakarun <unk> amma ta yi nasarar jefawa a
2005 Gasar Zakarun Turai ta 'Yan Wasanni na U23, ta ɗauki matsayi na huɗu. Ta tsallake mita goma sha takwas a karon farko a shekara ta 2006 kuma ta ƙare shekara tare da ingantaccen tarihin mutum. Ta kuma kasance ta biyu a wasan farko na gasar cin kofin Turai ta 2006.