I want to know can i come back qatar again

If the foreigner left Qatar without any problems then it is
Upon the approval of the Ministry of the Interior and the Ministry of Labor, the expatriate may return to the state, but if the foreign worker has been disciplined, according to the provisions of the aforementioned Labor Law, or according to the provisions of the laws regulating the affairs of state employees or any other law that did not appeal or appeal against the decision before the competent court and rejected his appeal according to a final ruling from the competent court. It is not permissible for him to return to the country to work until four years after the date of his departure also, the expatriate who issued a court ruling for his deportation or deportation may not return to the state except by a decision of the Minister
Here's the text of the law for Qatari expatriates, related to your inquiry:
Article (24):
If the Foreign National does not obtain a Residency Permit in accordance with this law, then he must leave the country.
The Foreign National must also leave the country within 90 days if his Residency Permit expires or it is revoked for any reason, or if the stated purpose for which he received the Residency Permit has expired.
The Foreign National may, with authorization from the Competent Authorities, re-enter the country provided that he has fulfilled the conditions necessary for entry, as prescribed in this law and its implementing regulation.
Article (26):
If the labourer is dismissed on disciplinary grounds, in accordance with the referenced Labour Law, or in accordance with the laws of the State Employee Affairs Organization, or any other law, and does not appear in court to contest the charges, or if he appeals and his appeal is refused in a final ruling from a competent court of law, then he shall not be permitted to re-enter the country until four years from the day of his departure have elapsed.
For the Foreign National who has been ordered by court ruling to be deported or repatriated may not re-enter the country unless decreed otherwise by the Minister.