Questions & Answers about Niemand belt mij in het weekend.
Standard Dutch uses Subject-Verb-Object (S-V-O) in main clauses. Placing mij before belt would break that rule. If you want to emphasize mij, you can front it, but then you must still keep the verb in second position:
• Mij belt niemand in het weekend.
Mij is the full (stressed) object pronoun, while me is its reduced (unstressed/colloquial) form. Both are correct:
• Niemand belt mij in het weekend. (formal or emphasizing)
• Niemand belt me in het weekend. (everyday speech)