 Nkausu played in Zambia's 3–1 unofficial friendly defeat of Pretoria Academy on 29 May 2012, the game acting as a warm–up match ahead of the "Chipolopolo's" 2014 FIFA World Cup qualification games.He made his first international appearance after the African Cup of Nations in a 2–0 2014 FIFA World Cup qualifying defeat to Sudan on 2 June 2012.The defender then featured in Zambia's 1–0 win over Ghana on 9 June, coming on as an injury–time replacement for Chisamba Lungu.