Herve Renard left out the former Buccaneer from his 25-member team unveiled on May 27 at Football House in Lusaka for the June 8 and 15 games against Lesotho and Sudan respectively.
Chansa has only recently returned to competitive League action since leaving Chinese club Henan Jianye at the end of 2012.
"Isaac has not been called for the June assignment," Football Association of Zambia spokesperson Erick Mwanza said.
"He has not been called largely because he has not played any League action from November last year."
Chansa this month signed a short-term deal with Zambian League champions Zanaco whom he has been training with since returning from the 2013 Africa Cup of Nations in South Africa.
This is the second time Renard has dropped Chansa after cutting him from the 2010 World Cup Group C qualifier against Egypt in March 2009
Goalkeepers: Kennedy Mweene (Free State Stars, South Africa), Daniel Munyau (Red Arrows), Rabson Muchelenganga (Nchanga Rangers), Davy Kaumbwa (Green Buffaloes),
Defenders: Joseph Musonda (Golden Arrows, South Africa), Bronson Chama, Jimmy Chisenga (both Red Arrows), Davies Nkausu (SuperSport United, South Africa),Khondwani Mtonga (Zesco United), Emmanuel Mbola (Porto, Portugal), Noah Chivuta (Free State Stars, South Africa), Hichani Himonde (TP Mazembe, DRC)
Midfielders: Nathan Sinkala, Rainford Kalaba (both TP Mazembe, DRC), Shadreck Malambo (Red Arrows), Chisamba Lungu (FC Ural, Russia), Mukuka Mulenga (Power Dynamos)
Forwards: Alex Ngonga, Bonwell Mwape (both Nchanga Rangers), Fwayo Tembo (Astra Giurgiu, Romania) Collins Mbesuma (Orlando Pirates, South Africa), Emmanuel Mayuka (Southampton, England), James Chamanga (Liaoning Whowin, China), Jacob Mulenga (FC Utrecht, Holland), Christopher Katongo (Henan Jianye, China)