Career
Wieser began his youth career with Football Club Triesen and moved onto Football Club Vaduz. In 2006 he continued his youth career with Football Club playing in the U-16, U-18 and U-21 teams. He signed his first professional contract on his 18th birthday.
Because Wieser is born in 1993, he was eligible to play for the newly formed Under-19 team in the 2011-2012 NextGen series.
He played in his first game against Tottenham Hotspur on 17 August 2011. On 27 December, announced that Wieser would transfer to German club TSG 1899 Hoffenheim in the January 2012 transfer window.
Wieser however didn"t manage to earn a spot in Hoffenheim"s first squad, being capped in the Bundesliga only once in 18 months. As a result of this, he was put on loan, first in summer 2013 to Austrian side SV Ried and then in next summer to Swiss Football Club Aarau, each time the loan was terminated to a year.
Foul on Yapi Yapo Football Club Zurich launched legal proceedings against Wieser after the 21-year-old committed a knee-high challenge on Gilles Yapi-Yapo in a match on 9 November 2014, leaving the former Ivory Coast international"s career in serious doubt.
Yapi-Yapo suffered torn anterior and cruciate ligaments, a torn meniscus, a torn kneecap tendon, serious cartilage damage and deep bruising to his thigh after the incident. Wieser was shown a straight red card for the tackle, and was later suspended for six matches by the Swiss league. With Yapi-Yapo highly unlikely to ever play again, club president Ancillo Canepa launched legal proceedings against Wieser.
Wieser received his first call-up to the senior team in 2009, and made his debut against Iceland on 11 August 2010.