restricted is /rɪˈstrɪktɪd/ in the Oxford Advanced Learner's Dictionary: three syllables, primary stress on the middle one. The page does not label the variety for this form.
A rough cue, not phonetics: ri STRIK tid. Keep ri light, lean on the middle, finish quickly.
Target phrase: The area is restricted. Weight on the middle syllable.
Mouth cues for the stressed syllable
Say ri softly: bunch your tongue slightly back for the R sound, keep your lips loosely spread, and glide quickly through this syllable without pushing it.
Snap your stress onto STRIKT: open into the vowel, then press your tongue tip up to just behind your top teeth for the T sound and hold it briefly.
End with tid: release the held T straight into the D, one quick tongue tap on the ridge, jaw barely moving, so the middle syllable stays the clear center of the word.
Say it in a phrase
Contrast cue: the base verb restrict is transcribed /rɪˈstrɪkt/ with primary stress on the second syllable, so restricted keeps that stressed root and simply adds tid. Say restrict, then hold the T briefly before adding tid.
Contrast pair: We restrict it. versus It is restricted. Both put stress on the same root syllable; only the ending changes, so keep the middle beat identical in both sentences.
Related phrase: Access is restricted here. Same stress pattern: a light ri, a strong STRIKT, a quick tid at the end.
Rhythm note: when restricted is the final word, as in The area is restricted., the stressed syllable can stretch slightly longer and take the sentence's natural fall, while ri and tid stay short.