Quick anyone know the answer to this?

Option 3 -

Step-by-step explanation:

Given : Expressions -3 , 0,

To find : Which of the following expressions cannot be written as an integer?

Solution :  

An integer is a whole number that can be positive, negative, or zero but not a fractional number.

1) -3 is a negative number so it is an integer.

2) 0 is an integer.

3)

The given number is not an integer as it is in decimal and fractional form.

Therefore, Option 3 is correct.