New Zealand will boycott an upcoming counter-terrorism meeting co-chaired by the Myanmar and Russia, according to reports.

The meeting will be held on July 20 and 21 in Moscow, and attended by members of the Association of Southeast Asian Nations (ASEAN) and their partners as part of the ASEAN Defense Ministers' Meeting-Plus (ADMM-Plus) counter-terrorism working group.

The New Zealand defense ministry's deputy secretary for policy and planning, Michael Swain, told Myanmar Now and New Zealand outlet Newsroom, which respectively published Monday and Tuesday, that Wellington will "not be attending nor participating on this occasion."

"We concluded that the benefits of attending to convey New Zealand's views are outweighed by the risks of being portrayed by Russia and Myanmar as supporting their approach," he added.