For what it's worth...
T+3 is US Stock settlement.
T+3 is also used for all of Asia settlement sans HK trades which are T+2
T+2 is also for all europe stocks sans Spain which I think is T+3 but may be T+2 as I think that changed this year.
Looking at Middle East, I believe it's T+3 for most. Israel however, is weird. It can be T+1 or T+2 depending on the broker. Also Israel is closed Friday and Saturday and open on Sunday although some Brokers wont settle until Monday and do not count Sunday as a settlement day (US brokers, local brokers may be different in Israel)
South Africa is T+5.