Disable Function Key F3 from Unix

hie. i would want to disable the function key F3 from Unix Sco. I could not do this from my apllication due to its limitatation. i included the following line in the .profile file

stty susp [fk3].

Unfortunately this is disabling all the function keys.

Is there a way in which i can disable only the F3 key.

Does this help at all?? F3 to F10 not working with TERM=ansi ?