No, if you are a Singapore resident who is not a resident of any other country, then
there is no WHT for dividends of WQDV.
I have
never been charged any tax for dividends of my VWRD, as you can see below. It says "Exempt From Withholding".
Taxation is a complex subject, especially when the asset is global, and domiciled in a country you are not a resident of. There are multiple layers of taxes. The fund manager may need to pay for WHT for US stocks (the 15%) and to other countries as well. Once the dividend land on your hands, it may be subject to further taxes depending on your residency. If you are a Singapore resident, then no tax on your dividend as I have shown above. I think the iShares rep misunderstood you as someone who resides in Ireland or Europe etc, where dividend or capital gain tax may apply.
Annual Report 2019 -
https://www.ishares.com/uk/individu...port/ishares-ii-plc-2019-en-annual-report.pdf
Check page 64. iShares MSCI World Quality Dividend UCITS ETF (WQDV) had an income (I assume mostly dividends) of $1.654m, and fund manager paid taxes of $201k. That's about 12% of dividends they received. This ETF has about 54% of holdings in US stocks. Fund manager will pay 15% to US IRA, and similar/other taxes to other countries which may have higher, lower or no tax. iShares declares dividend after deducting this tax expenses. That's why I say the dividend is net of WHT.
Let's check a pure US ETF, shall we?
Check page 63 - iShares MSCI USA Quality Dividend UCITS ETF (QDIV). Tax of $1.862m on $13.145m income = 14.17% which is very close to the 15% WHT payable to US IRA. I see that iShares participates in securities lending. That is probably the reason some of the income may not be taxable, and why we don't see a perfect 15% here.
If you want to better understand taxation matters, I refer you to iShares Prospectus -
https://www.ishares.com/uk/individual/en/literature/prospectus/ishare-ii-plc-en-emea-prospectus.pdf page 134-145. That will clear up a lot of confusions.