ASEAN's meteorological centre raised its top haze alert (Level 3) for southern ASEAN, covering Indonesia, Malaysia, Singapore and Timor-Leste. Schools have closed and outdoor activity is restricted in places. The article does not cover Thailand directly. For Thai SMEs, the main exposure is indirect: supply-chain or export delays for firms trading with Indonesia or Malaysia, and staff or customer disruption for businesses with regional links. Singapore is naming Indonesian pulpwood and timber suppliers, which matters only for firms that buy from them.