Hi, I understand there is a 30% dividend withholding tax for US equities and ETF. However, I will like to clarify if this applies to Asia Equity/ETF listed in the US market too?

This blog post by The Invest Quest would answer your inquiry and more:

The Ultimate Stock ETF List for SG Investors

https://theinvestquest.com/ultimate-stock-etf-l... ​​​

If you invest in stocks/ETFs domiciled in US, there will be 30% dividend withholding tax. If its a US domiciled ETF with China companies, the ETF fund will pay a dividend withholding tax of 10% to China and then you will pay additonal 30% dividend withholding tax to US. If you invest in China/Hong Kong through US instead of HKEX, your returns will be affected even more.

So if possible try to invest through HKEX if you want to get into china/hong kong companies since Singapore have tax treaty with Hong Kong.