compile level else statement

I'm not sure if this would work but I thought I'd bounce this off you guys anyway.

So, I have an if/elseif/else statement and cut out the else part to cut down on code space. I thought about leaving it in and only compiling this section if I set a certain bit using #define statements. For example, my code started off like this:

unsigned char variable;

if(variable==1)
{
        //Condition 1
}
else if(variable==2)
{
        //Condition 2
}
//else
//{
//      //Condition 3
//}

I wanted to include Condition 3, but only if I set the #define bit so now my code looks like this:

#define definecondition 1
unsigned char variable;

if(variable==1)
{
        //Condition 1
}
else if(variable==2)
{
        //Condition 2
}
#if(definecondition==1)
{
        else
        {
                //Condition 3
        }
}
#endif

It turns out the way I am trying to implement this does not compile due to the else statement currently within a separate if statement. Now, I can still do this by using:

#if(definecondition==1)
{
        if((variable!=1)&&(variable!=2))
        {
                //Condition 3
        }
}
#endif

but I was curious if there was a way to use the #define statement to still be able to work with the previous if statement (as demonstrated above). I tried using a #else statement but that didn't work either (it was worth a shot). Any other methods that might work out? I can force it to work using my method but if there's a better way, I'd like to know.

Thanks, guys!