Can a 12 month old todler oversleep? 14 hours at night 3 hours for a nap. is this ok/normal?

Sleep: Infants need lot of sleep upto 16 hrs, if this is new then contact pediatrician.

Sleep: Is the toddler getting restful sleep? If so, then he/she is simply going through a growing cycle which is why they need so much sleep. Be happy they are sleeping well....And take advantage by getting some sleep yourself. There will be a time when they don't sleep so well and you will miss the times they did.