Nationals of the Marshall Islands holding ordinary passports can obtain visas to Armenia: by E-VISA system at the Armenian Embassies and Consulates at the border of Armenia, if they provide a valid residence permit or valid visa issued by the EU and Schengen member states
Quoted from the source.
Before you go
The conditions that come with this rule, from its official sources.
Conditions from official sources
Can get the visa at the border instead with a valid residence permit or visa from the EU or Schengen states, the USA, Australia, New Zealand, South Korea, the UK, Canada, Russia or Japan, or a residence permit card or sticker from the UAE, Saudi Arabia, Kuwait, Qatar, Bahrain or Oman.
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 the Marshall Islands.
Armenia passport Marshall Islands
Visa needed
All other nationalities must obtain a visa before traveling. Applications must be lodged while the applicant is outside the Republic.