Does communication breakdown count as grounds for divorce in Singapore?

Short answer

Communication breakdown by itself is not enough to prove that the marriage has broken down, but prolonged lack of communication is commonly cited as supporting evidence for how the marriage broke down in an application for divorce based on mutual agreement. If there is an intentional shutdown of communication from one spouse in an attempt to "cold shoulder" or "emotionally punish" the other spouse, this can be used to prove a fact of unreasonable behaviour.