Passage: In the summer of 2011, Guaita signed a contract with Ecuadorian Serie A side Independiente José Terán. He made 18 league appearances in the Second stage of the season, scoring one goal, helping the club avoid relegation. Guaita moved to 3. Fußball-Liga club SV Wehen Wiesbaden in January 2012. He made his debut on 24 January in a 1–1 draw against SV Werder Bremen II, coming on as a substitute for Jonne Hjelm in the 69th minute. Guaita played only one match for the first team and one game for the second team in the Hessenliga. On 20 March, Guaita had his contract terminated by mutual consent.On 12 July 2012, Guaita signed a half-year deal with China League One side Shenzhen Ruby by manager Philippe Troussier. He made his League One debut on 21 July in a 1–0 home win against Tianjin Songjiang, coming on as a substitute for Takashi Rakuyama by the end of the match. Mainly used as a substitute by Shenzhen Ruby, Guaita made 11 appearances in 2012 season and scored a goal. He was released by Shenzhen at the end of the season.

Question: when did Guaita's contract get terminated?
20 March