Premier Stephen McNeil said Tuesday that Younger is facing personal matters that require his full attention and he requested a temporary leave.
A spokeswoman for the premier wouldn't elaborate on the statement from McNeil.
Younger, who represents Dartmouth East in the legislature, is also responsible for Communications Nova Scotia and Part One of the Gaming Control Act.
Michel Samson, the minister of economic and rural development and tourism, will assume Younger's portfolios temporarily.
Younger first became a member of the legislature in June 2009 after serving five years on Halifax regional council.