For example, if you already own an overseas property but this is your first property in Singapore, the LTV limit would be 75% or 55%, depending on the loan tenure and your age. However, owning an overseas property does not affect the LTV limits for your first property purchase in Singapore since only residential properties in Singapore are counted towards these limits.
It's great to assist you through EdgeProp Buddy. Given that I'm in Beta phase, it's prudent to get professional real estate advice on such topics.