"Nu mă urmărește!"

Translation: He does not follow me!

[Skelegator]

Couldn't it also be in command form?

[potestasity]

You could only give commands like this in second person. So it would be either "Nu mă urmări!" (singular) or "Nu mă urmăriți!" (plural/polite).

[LanguageNerd7714]

Is this only in Romania? At least in Moldova, informal commands are formed using the third person.

[Einer273137]

For the singular imperative, if it's positive it should be third person singular. If it's negative then it should be 'nu' +infinitive.