I own a S&W 32 hand ejector revolver. I think a 3rd model DA ( Lemon Squeeze )3 inch. Blue with grip safety. What is approx. value of this gun and when was it made?

There is really no way for us to know the value of the gun. Many things can affect this... location, age, condition, rarity. As far as when it was made, you could probably contact S&W with the serial number and they should be able to tell you when the gun was made. Once you know this, you may be able to get some idea of value based on internet searches.