The Stock Exchange of Thailand index dropped, while other markets in the region were largely subdued as investors remained cautious amid signs of slowing global growth.
Tensions over Sino-US trade ahead of a high-stakes meeting this month between US President Donald Trump and Chinese President Xi Jinping kept investor sentiment fragile in Asia.
The SET index declined 12.93 points or 0.8% to 1,604.40 in trade worth 35 billion baht. Thai shares were dragged by lossesin industrial and energy sectors.
Airports of Thailand Plc slipped 2.4%, while PTT Exploration and Production Plc shed 1.9%.
Oil prices fell on Thursday after US crude inventories swelled to their highest level since December stoking concerns about a global glut but Opec talk of an output reduction limited losses.
Indonesia's benchmark index rose 0.7%, driven by gains in financial and consumer stocks.
"I think investors are considering Indonesia as an relatively insulated market during this tech and export-driven retreat," said Taye Shim, head of research and strategist at Mirae Asset Sekuritas.
"Further, Indonesia surprised the market with its recent rate hike -- which we think is a country-specific relief factor, which reinforced investor sentiment on the Indonesian market."
Indonesia's central bank last week unexpectedly raised its benchmark interest rate for the sixth time this year, as policymakers struggle to reduce imports and lower the country's current-account deficit.
Bank Central Asia Tbk PT was up 1.2%, while cement manufacturer Semen Indonesia (Persero) Tbk PT rallied 6.5%.
Singapore shares edged marginally higher with conglomerate Jardine Matheson Holdings Ltd gaining 2.1% and Hutchison Port Holdings Trust firming 2%.
The city-state's economy expanded at a much slower pace than initially thought in the third quarter, with the government flagging further moderation in the current quarter and warning that the Sino-US trade war will hurt growth in 2019.
Philippine and Malaysian shares closed flat for the day.