He has been beaten on a 3-2 split decision against Indonesia's Aldoms Suquor in the last 64.
Earlier this year he secured a bronze medal at the European Games.
He beat Spain's Martin Molina Salvador on a split decidion in their light-flyweight boxing quarter-final in Minsk.
Buckley then advanced to the semi-finals but lost out along with Michael Nevin and Grainne Walsh.
The Wicklow native won Ireland's first medal at this Games.
IFA Say Dog Attacks In Wicklow Are Getting Worse
One in-calf heifer has been killed and a number of cattle are injured following a dog attack
Bray Library Gets 3 Million Euro Investment
Taoiseach Simon Harris has announced €3 million in funding for Wicklow County Council’s Ballywaltrim Library.
Battery Electric DART For Wicklow Under Review.
The National Transport Authority has said the DART extension to Wicklow Town is still under active review
Wicklow's Hozier Reaches Number One In US Charts
Hozier has become the fourth Irish artist to reach number one in the US.
Over One Million Euro For Wicklow Roads Improvement Scheme.
Taoiseach Simon Harris has announced an extra €1,279,015 for repairs and improvement works on non-public rural roads under the Local Improvement Scheme.
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