Summary: Non-signatory Tonga has never made a public statement elaborating its position on joining the convention. It has never participated in a meeting of the convention. Tonga is not known to have ever used, produced, transferred, or stockpiled cluster munitions.
The Kingdom of Tonga has not yet acceded to the Convention on Cluster Munitions.
Tonga has never made a public statement to elaborate its views on cluster munitions or position on acceding to the convention. In February 2018, Tonga attended a Pacific Conference on Conventional Weapons Treaties and adopted the declaration acknowledging “the clear moral and humanitarian rationale for joining” the Convention on Cluster Munitions. 
Tonga attended one meeting of the Oslo Process, the Wellington Conference on Cluster Munitions in February 2008, but did not endorse the Wellington Declaration supporting the negotiation of an instrument prohibiting cluster munitions. Tonga did not attend the subsequent Dublin negotiations or the Convention on Cluster Munitions Signing Conference in Oslo.
Tonga has never participated in a meeting of the Convention on Cluster Munitions. 
Tonga is not party to the Mine Ban Treaty or the Convention on Conventional Weapons.
Use, production, transfer, and stockpiling
Tonga is not known to have ever used, produced, transferred, or stockpiled cluster munitions.
 According to the declaration, during the meeting “some states not yet party to the Convention undertook to positively consider membership of it.” “Auckland Declaration on Conventional Weapons Treaties,” Pacific Conference on Conventional Weapons Treaties, Auckland, New Zealand, 12–14 February 2018.
 Tonga attended regional meetings on explosive remnants of war (ERW) in the Pacific held in Koror, Palau in October 2012 and Brisbane, Australia in June 2013. Email from Lorel Thompson, National Coordinator, Safe Ground, 30 March 2014.