Kamande has not played for Kenya for nearly a year but chief selector Tom Tikolo said the former medium-pacer had shown improvement in his form and had big potential as a genuine spinner and batsman.
"Kamande would prove useful with his spin and in getting the runs in Windhoek," Tikolo said, adding that Kenya needed to win to qualify for the semi-finals.
The two countries, who meet on June 3-5, share top spot after both beat Uganda in their opening matches of the three-nation series.
Aga was left out of the match in Kampala after leading Kenya as stand-in captain for the inaugural cup semi-finals and finals in the United Arab Emirates last November.
The selectors have left out Tanmy Mishra, the 17-year-old batsman, who made his debut against Uganda and opener David Obuya, the youngest of three brothers in the national team.