Hello,

In settings >> access rights, You can remove the create access for particular group/user.

shivoham.odoo@gmail.com

You can hide create button in res partner from all users by overriding the form, kanban and tree view as below:

<!-- Hide create button from Kanban View -->
<record id="res_partner_kanban_view_hide_create" model="ir.ui.view">
    <field name="name">res.partner.kanban.inherit.hide.create</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.res_partner_kanban_view"/>
    <field name="arch" type="xml">
        <xpath expr="//kanban" position="attributes">
            <attribute name="create">0</attribute>
        </xpath>
    </field>
</record>



<!-- Hide create button from Tree View -->
<record id="res_partner_view_tree_inherit_hide_create" model="ir.ui.view">
    <field name="name">res.partner.view.tree.inherit.hide.create</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_tree"/>
    <field name="arch" type="xml">
        <xpath expr="//tree" position="attributes">
            <attribute name="create">0</attribute>
        </xpath>
    </field>
</record>





<!-- Hide create button from Form View -->
<record id="view_partner_form_inherit_hide_create" model="ir.ui.view">
    <field name="name">res.partner.view.form.inherit.hide.create</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_form"/>
    <field name="arch" type="xml">
        <xpath expr="//form" position="attributes">
            <attribute name="create">0</attribute>
        </xpath>
    </field>
</record>