Can I bring suit against my employer for deformation of character and my employer not abiding by the contract?

You have asked about two different claims (1) defamation and (2) breach of contract.  As to defamation, you have not set forth any facts that show that your employer committed defamation against you.  An action for defamation requires the plaintiff to prove four elements: “(1) a false and defamatory statement . . . ; (2) an unprivileged publication to a third person; (3) fault, amounting to at least negligence; and (4) actual or presumed damages.” Pope v. Motel 6, 121 Nev. 307, 114 P.3d 277 (2005); K-Mart Corporation v. Washington, 109 Nev. 1180, 866 P.2d 274 (1993).  You have not indicated that your employer made any false publications as against you. In regards to breach of contract, if you have an actual employment contract which your employer has violated, you may have a claim under that contract.  Be aware that Nevada is an at will employment state.  Since employees in Nevada are presumed to be at-will, an employer can dismiss an at-will employee with or without cause, so long as the dismissal does not offend this state's public policy. State of Nevada v. Dist. Ct. (Anzalone), 118 Nev. 140, 151, 42 P.3d 233, 240 (2002).  Therefore make sure that you have an actual contract which has been violated.