Yes. The filing party must request service of the citation on all named defendants within ninety (90) days of the date of filing commencing the case.
The Court counts 90 calendar days beginning on the day after the date of the filing of the petition for divorce. This count includes Saturdays and Sundays. If the last day of the 90 day period falls on a Saturday, you should request service by the Friday before. If the last day of the 90 day period falls on a Sunday, you can request service on the following Monday.
If service is not timely requested, the defendant can file something called a "declinatory exception of insufficiency of service of process". If the defendant files the declinatory exception, you may need to re-file the petition and potentially re-pay the filing fees. Make sure to timely request service.
If 90 days have not passed since the date of the filing of the petition, you can still timely request service! You can contact the clerk of court and say that you need to request service on the defendant in your case.