Yes. If you do not have a dedicated intervalometer, you can still shoot a time-lapse with a Nikon D3300 by using an external device to trigger the camera at set intervals.

Options mentioned by users include:

• Connecting the camera to a computer over USB and controlling it with software such as gPhoto on a Unix-like system. A simple script can trigger exposures at precise intervals.
• Connecting an Android phone to the camera with an OTG cable and using DSLRDashboard, which can control many camera functions and automate shooting.
• Using a smartphone with an IR blaster plus a remote-control app, if your setup supports Nikon infrared triggering.

For best results, use a tripod, keep exposure and white balance consistent to avoid flicker, and plan your interval based on how fast the scene changes. In short: without a standalone intervalometer, a computer, compatible phone app, or IR remote app can serve the same purpose.