The Wallabies lock is a free agent after Western Force lost their Super Rugby status and has been linked with a move to Melbourne Rebels.
Munster are among the European clubs who are said to be keen to sign the 25-year-old, who has been a key player for his country under Michael Cheika.
Coleman faces a dilemma over whether to continue playing at international level or move overseas and will not rush his decision.
"In terms of me, personally, there is a lot of water to go under the bridge and I am just assessing my options at the moment," he said.
