Can I use both external interrupt and Timer?

When I use Arduino mega 2560, digital pin 3 is PE5/OC3C/INT5

I am using this pin as external falling interrupt.
And I want to use Timer3 now.

I know that OC3C is output pin when timer interrupt is generated, (if I set COMnA or B or C in TCCRn register )

but I want to use this Timer3 just as timer interrupt operation, not port operation like OC3C.

In this case, Can I use both Timer3 and INT5 at the same time?
Does Timer3 function affect INT5?

At 99% you can do it.

ok i try

Smajdalf:
At 99% you can do it.

Thank you my friends ,

But Smajdalf, why did you say that I can do it 99%?
Are there some exceptions?

wogkr3654:
Thank you my friends ,

But Smajdalf, why did you say that I can do it 99%?
Are there some exceptions?

It is possible on every AVR I know about. I don't know Mega2560 and I am pretty sure it will work. But I didn't try it.