Answer: She is displaying normal lack of impulse control
Explanation: Generally, impulse control disorder is the inability to resist an impulse, that is, a temptation, an urge, or some thought, where impulsive reactions may interfere with or otherwise injure others. Such persons have a problem controlling their emotions and behaviour.
In this case, it is a child of three years, which means that there is a case of normal lack of impulse control. In other words, such children are driven by impulses, such children experience an impulse as something that should be expressed immediately without paying attention to rules or restrictions, for them it's natural. And this can be called some kind of disorder, but more like a problem with attention deficit, where the basic problem is that such children accept that they should first stop and think about the thought that came to their mind before reacting, because usually such children they respond immediately.