Today's reading: https://asean.org/joint-statement-of-the-28th-asean3-finance-ministers-and-central-bank-governors-meeting/
ASEAN+3: "Amid rising uncertainties and long-term structural shifts, we reaffirm our full commitment to multilateralism, and a rules-based, non-discriminatory, free, fair, open, inclusive, equitable, and transparent multilateral trading system, with the World Trade Organization at its core. We will enhance macro-economic policy dialogue, promote regional financial cooperation, and ensure stable and unimpeded industrial and supply chains, with a view to jointly safeguarding regional economic and financial stability. We fully support the robust implementation of the Regional Comprehensive Economic Partnership (RCEP) Agreement"
3 guesses which country isn't in that, and the first 2 doesn't count.