I need the camera to take a picture every 3 seconds. can this camera do so

It's not possible to take a photo in a second, because the camera needs to get in focus the object you're taking picture of.

You have a square on your display that indicates where the focus will be.
With whatever function you use, you need to press the shutter button halfway and wait for the camera to focus on the object. When it's focused you will hear the click and the square will turn green.
Now your pictures shouldn't be blurry.

Hi, Follow these steps:
1. In any Still mode, tap Settings to open the Settings panel.
2. Tap Self-Timer/Burst repeatedly, until the desired Self-timer icon appears at the bottom of the LCD: 10 seconds—A picture is taken after a 10-second delay (so you have time to get into the scene). 2 seconds—A picture is taken after a 2-second delay (for a steady, auto-shutter release on a tripod). 2 shot—The first picture is taken after a 10-second delay. A second picture is taken 8 seconds later.
3. Compose the scene. Press the Shutter button halfway, then completely down. The camera takes the picture/pictures

1 In any Still mode, press the button repeatedly to choose: 10 seconds?A picture is taken after a 10-second delay (so you have time to get into the scene). 2 seconds?A picture is taken after a 2-second delay (for a steady, auto-shutter release on a tripod). 2 shot?The first picture is taken after a 10-second delay. A second picture is taken 8 seconds later. 2 Compose the scene. 3 Press the Shutter button halfway, then completely down.

1. Remove the battery and reinsert it after 30 seconds. 2. Try resetting the Camera. To reset, refer supplied Manual. 3. If stil not resolved, please get the device serviced.

hi... try this method

1 In any Still mode, tap Settings to open the Settings
panel.
2 Tap Self-Timer/Burst repeatedly, until the desired
Self-timer icon appears at the bottom of the LCD:
10 seconds—A picture is taken after a 10-second
delay (so you have time to get into the scene).
2 seconds—A picture is taken after a 2-second
delay (for a steady, auto-shutter release on a
tripod).
2 shot—The first picture is taken after a 10-second
delay. A second picture is taken 8 seconds later.
3 Compose the scene. Press the Shutter button halfway, then completely down.
The camera takes the picture/pictures after the delay....

thank u

1 In any Still mode, tap Settings to open the Settings
panel.
2 Tap Self-Timer/Burst repeatedly, until the desired
Self-timer icon appears at the bottom of the LCD:
10 seconds—A picture is taken after a 10-second
delay (so you have time to get into the scene).
2 seconds—A picture is taken after a 2-second
delay (for a steady, auto-shutter release on a
tripod).
2 shot—The first picture is taken after a 10-second
delay. A second picture is taken 8 seconds later.
3 Compose the scene. Press the Shutter button halfway, then completely down.
The camera takes the picture/pictures after the delay.

1. Press the WB / Func button.
2. Scroll down to the Drive Mode icon (usually a single rectangle)
3. Scroll over to select the Clock/2 or Clock/10 icon (2 second or 10 second delay)
4. Press Set (on the multicontroller button)

Now, when you press the shutter button, the camera will delay 2 or 10 seconds before taking a picture.

To return to normal, follow the steps above, but select the rectangle icon (single shot) in step 3.

You can download a manual (Camera User Guide) for your camera here.

Depends on what you mean by continuous pictures. If you mean that you want to take pictures as fast as possible as long as the shutter button is held down, you just need to change the "drive" mode of your camera to continuous. The rebel can shoot at ~3 images per second.

If you mean that you want to take time lapse pictures, i.e. set the camera on a tripod and take one picture every 30 seconds, you'll need a timer. Canon makes a device that does this called the TC80N3, but it doesn't work with the Rebel. Someone has created a modified version of the TC80N3 that works with the rebel at:

http://rebeltimelapse.com/

Also I found this one on google:

http://www.universaltimer.com/home.html

I haven't personally used either of those products, but you will need something like it to take time lapse photos.

Hi there,
by the way in setting the timer for your camera here is what you are going to do...

-turn the camera on
-set the camera in recording
-press the Right Button beside the menu button (the incomplete circle)
-and then you will see that there will an icon showing in the left side part of the screen of the camera.

Selecting the self-timer
1. Rotate the MODE DIAL to select a RECORDING mode with the exception of VOICE RECORDING mode.
2. Press the SELF-TIMER button until the desired mode indicator displays on the LCD monitor.
A 10 second, 2 second or double self-timer icon appears on the LCD monitor. In Movie Clip mode, only the 10-second self-timer will work.
•2SEC self-timer (icon of incomplete circle with 2S)
: Pressing the shutter button will allow an interval of 2 seconds before the image is
taken.
•10SEC self-timer (incomplete circle)
: Pressing the shutter button will allow an interval of 10 seconds before the image is taken.
•Double self-timer (double incomplete circle)
: A picture will be taken after about 10 seconds and 2 seconds later a second picture will be taken. When using the flash, the 2-second self-timer may be delayed for longer than 2 seconds depending on the flash charge time.
3. When you press the SHUTTER button, the picture will be taken after the
specified time has elapsed.

1. If the camera can not focus on a subject, or can not determine the appropriate exposure setting, the camera will beep and disable the shutter button. This is to avoid improper processing of the image. This is usually due to either poor lighting conditions or movement. 2. The camera Flash Element requires ten seconds to recharge between images. Although the camera is ready to continue capturing images almost immediately in bright (daylight) settings, if you are using Flash photography the Flash element will need to charge between shots. If you try to take a picture before the Flash is charged, the camera will beep and disable the shutter button. Once the Flash unit is fully charged (10 seconds), the camera is ready to continue. 3. The batteries may be running low. LCD Display, Flash, and Playback use much more power than taking pictures. It is possible to quickly consume battery power, even if you are not taking many pictures. Try turning the Mode Dial to the OFF position to recycle power. If the camera beeps and will not take a picture under normal conditions, you may need to change batteries.