“For me, I’ve had a great time and really enjoyed the role and (I’m) loving it still.
“We’ll just get to that point and work out what we do from there.”
The former Test batsman last year extended his contract until October 2019 and says he won’t seek a new deal.
His final year in charge will include Australia’s title defence at the one-day international World Cup and then an Ashes series.
Lehmann, 47, became Australia coach in 2013 after the sacking of Mickey Arthur.
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His record at the helm includes victory in the 2015 World Cup, winning two Ashes series at home and losing two in the UK.
Few indications have yet been given as to who might replace Lehmann, although his former teammate and current Western Australia coach Justin Langer is considered an early favourite for the role.