Certificate of no impediment

Hello,

I’m Myanmar citizen and my partner is Polish. We’re planning to get married but we need certificates of no impediment and single status from respective countries. I have no idea how to get it from Myanmar. I can’t go back to Myanmar as I was involved in some political activities. I am currently staying in Singapore for 30 days visa free. I doubt Myanmar embassy will give the documents too. Please advise if you have any information about this.

Thanks )