Of the 10 ASEAN nations, only Cambodia and the Philippines have outlawed it, though Laos and Brunei have not conducted executions for decades.
[1] Thai law permits the imposition of a death sentence for 35 crimes, including treason, murder, and drug trafficking.
Of these 21 methods of death penalty, only 1 method was used for perpetrators of treason, offences against the king, robbing and burning cities, palaces, granaries, royal treasuries or temples, cruelty to monks and villagers, murder of parents, teachers or preceptors, trampling or obscenity to statues of Buddha, cutting off a child's hands, feet, or neck to remove jewellry.
[9] On 19 October 2003, Thailand officially abolished shooting and adopted lethal injection as the sole means of execution.
[11] A 2014 Bangkok Post article said that Mahidol University lecturer Srisombat Chokprajakchat's survey indicated "more than 41% of Thais nationwide want to keep the death penalty on the books, but only 8% want to scrap capital punishment, with the majority undecided...most of those who favoured execution as a legal punishment felt it was the most effective deterrent against capital crimes, including murder and rape".
[1] Prime Minister Prayut Chan-o-cha in 2018 said that the death penalty is necessary to maintain peace and order and deter severe crimes.