Club list manager Tim Harrington confirmed the 19-year-old had inked a new deal for 2010 and 2011.
"We've just locked in another one with Maric," he said on Tuesday.
"There are a couple [of contracts] still in progress and I'm confident they'll be done, but they're not finalised as yet."
Maric, who was drafted at No.21 in the 2007 NAB AFL Draft, has played 11 matches, including six in 2009, before a shoulder injury ended his season after round 13.
An outstanding kick, he is a forward with the potential to play midfield long-term.
Although long-serving Melbourne trio Russell Robertson, Paul Wheatley and Matthew Whelan have departed, the club has yet to make any further changes to its playing list.
Harrington said the Demons would review its squad post the October 5-9 exchange period.
"We'll finalise a few things and state our position after trade week," he said.
The Demons recently re-signed skipper James McDonald for 2010 and promising youngsters Cale Morton, Jack Grimes and Stef Martin until the end of 2011.
