CA is a professional course. It is considered as a Qualification and not a degree. It is not equivalent to graduation and cannot replace it either.
In case you wish to study abroad you have to do graduation it can be B.com, BBA or anything but you have to do it. You must note in Pakistan and many in many foreign country graduation is completed in two to four years. Where as in India bcom, BBA or any Other Equivalent is a three year course. They also follow a system of credits which depend on courses you have studied during under graduation. If you are keen on studying abroad it will be good to check their credit requirement and take up course accordingly because many course may need additional degree to meet credit requirement.
For Indian Students:
If you do not want to do graduation along with CA, you can look for memorandums which ICAI has entered with open universities where you will get graduation degree once you clear your IPCC.
An advise, CA is highly unpredictable it is always good to keep your back safe. if of you are doing ca, graduation would be a cake walk for you So better take up graduation.