partner-contact/partner_address_street3/view/partner_view.xml

<odoo>

    <record id="add_street3_in_form_view" model="ir.ui.view">
      <field name="name">add street3 in form view</field>
      <field name="model">res.partner</field>
      <field name="inherit_id" ref="base.view_partner_form"/>
      <field name="arch" type="xml">
        <xpath
            expr="/form/sheet/group/group/div/field[@name='street2']"
            position="after">
          <field name="street3" 
                 placeholder="Street 3..." 
                 class="o_address_street"
                 attrs="{'readonly': [('type', '=', 'contact'),('parent_id', '!=', False)]}"/>
        </xpath>
        <xpath expr='//field[@name="child_ids"]' position="attributes">
          <attribute name="context">{'default_parent_id': active_id,
          'default_street': street, 'default_street2': street2,
          'default_street3': street3, 'default_city': city, 'default_state_id':
          state_id, 'default_zip': zip, 'default_country_id': country_id,
          'default_supplier': supplier, 'default_customer': customer,
          'default_lang': lang,}</attribute>
        </xpath>
        <xpath expr="/form//field[@name='child_ids']/form//field[@name='street2']"
               position="after">
          <field name="street3" placeholder="Street 3..." class="o_address_street"/>
        </xpath>

        <xpath expr="/form//field[@name='child_ids']/kanban/field[@name='street2']"
               position="after">
          <field name="street3"/>
        </xpath>

      </field>
    </record>

    <record id="add_street_3_in_kanban" model="ir.ui.view">
      <field name="name">add street 3 in kanban</field>
      <field name="model">res.partner</field>
      <field name="inherit_id" ref="base.res_partner_kanban_view"/>
      <field name="arch" type="xml">
        <field name="street2" position="after">
          <field name="street3"/>
        </field>
      </field>
    </record>

    <record id="view_partner_address_form" model="ir.ui.view">
      <field name="name">add street 3 in res.partner.form.address</field>
      <field name="model">res.partner</field>
      <field name="inherit_id" ref="base.view_partner_address_form"/>
      <field name="arch" type="xml">
        <field name="street2" position="after">
          <field name="street3" placeholder="Street 3..." class="o_address_street"/>
        </field>
      </field>
    </record>

</odoo>