Nationals of Thailand holding ordinary passports can obtain visas to Armenia: by E-VISA system at the border of Armenia at the Armenian Embassies and Consulates
Quoted from the source.
Before you go
The conditions that come with this rule, from its official sources.
Conditions from official sources
Not needed until 1 July 2027 with a residence permit card or sticker from the USA, an EU or Schengen state, the UAE, Bahrain, Qatar, Saudi Arabia, Kuwait or Oman that is valid for at least 6 months from entry; that stay is up to 180 days within a one-year period.
Passport validity
The source states no minimum passport validity.
Tourist entry only
These rules cover tourist visits. Work, study and transit follow other rules.
The other way round
What Armenia passport holders need to visit Bosnia & Herzegovina.
Armenia passport Bosnia & Herzegovina
Visa needed
Citizens of the Republic of Armenia, holders of valid ordinary and service/official passports are required visas when entering, exiting or travelling through the territory of Bosnia and Herzegovina.