My question is very similar to this where I want to communicate the reason why I won't be able to join the call/party or come to office but without giving any impression to my colleges that there are some issues.
Often I have to take leave for the family reasons and not necessary is family issue like someone fell ill or met with accident similar serious reasons but I take leave for attending Parnet-teacher meets or I have a party at home etc.
Can I just mention. "Family affairs" as a very broad reason?