Will I face any issues returning to Phuket after traveling to Malaysia and Singapore on a tourist visa?

The user's ability to re-enter Thailand after traveling to Malaysia and Singapore on a tourist visa largely depends on their recent travel history and how the Immigration Officer interprets their entry patterns. Given that they have been in Bangkok for 20 days, comments suggest that if they have not abused the tourist entry system and spend a few days outside Thailand, they should not face significant issues upon returning to Phuket.