The US doesn’t allow you to become stateless. So what happens is you go through the entire process for Singapore citizenship, then get approval and a confirmation - that’s used in the US renunciation process. Then you immediately acquire Singapore citizenship.
Did you renounce before or after getting Singaporean citizenship? Like did you have dual citizenship for a few days, or no citizenship for a few days?
The US doesn’t allow you to become stateless. So what happens is you go through the entire process for Singapore citizenship, then get approval and a confirmation - that’s used in the US renunciation process. Then you immediately acquire Singapore citizenship.