Sure you can. As of now you can request "hold" on a project one time during the project life cycle for up to 30 days. You can discuss with your project head for other formalities if you want to hold for longer than 30 days.
Please note once you request the hold, your project will be removed from the timeline for the period requested & another project shall be started. In between or till hold period, you may not able to request changes or addition. Also, resuming of the project after hold period shall be dependent on the project in hand & current delivery at that time so there may be some delay in resuming of the project. Your project head should be able to tell you the exact date of start/resume. We would try our best to resume it asap.